Description of a gemstone that blocks light from passing through. It could be due to the number of inclusions or flaws, or it could simply be a characteristic of the gemstone; opals, for example, exhibit varying degrees of opacity.
See also: Opal Clarity Gemstone clarity ...
Opaque stone care
Opaque stones can be ruined by chemicals. Wait a few minutes after applying hairspray or perfume to put them on; remove them before using lotion. -- In Style Magazine, July 1999
Jewelry Frequently Asked Questions
How can I test pearls and care for them?
In gemstone use, an opaque gem is one that does not allow light to pass through. It is not transparent or translucent.
Examples: Lapis , Turquoise , and Malachite .
opaque Impenetrable by light; neither transparent nor translucent. Opacity is the quality of being opaque.
orient The iridescent effect visible in finer quality pearls; also called overtone.
overcolor A stone with a hue that is overly dark in tone, usually above eighty-five percent.
Opaque: A substance which is not transparent or translucent. i.e. a substance that does not allow light to pass through it.
Open-work: A setting that has open areas similar to filigree cut which may allow for viewing of the bottom of a stone. See Basket.
Not transparent or translucent.
Matter that is not technically a gemstone, but is derived from animal or plant life. Organic gems include amber, coral, ivory, pearl and tortoise shell among others.
Opaque: No light is transmitted.
Translucent: Some light is transmitted.
Transparent: A high proportion of the light is transmitted.
Opaque: A term used for gemstones that you cannot see any light passing through the gem. Lapis and malachite are an example of this.
Something which is not transparent and does not reflect light; dull
Opaque & Porous gems:
Pearls, turquoise, coral etc need special care. These gems are porous i.e. they can absorb, so using a chemical cleaner, even soap may cause the stone to discolour. The best way to keep their shine, is to gently wipe them with a moist cloth.
The quality of not allowing the transmission of light.
The effect a material has on the transmission on light.
OPAQUE. When no light is transmitted.
OPTIC AXIS. The line in a double refracting crystal in the direction of which no double refraction occurs.
ORGANIC. Pertaining to the animal or vegetable kingdom.
Opaque Seed Bead
Seed beads that are solid in colour and therefore not transparent
Pearl Seed Bead ...
Opaque - There are several ways a light travels through a stone. In opaque stones, no light is reflected.
Open Work - Similar to filigree, this ring setting is designed to allow viewing of the bottom of the gemstone.
Opaque refers to the transparency of a gemstone. Generally opaque stone does not transmit light as it is so thick with inclusions or flaws and due to that light is blocked from passing through the gemstone.
Optical Effects ...
The term for a diamond that contains excessive inclusions and will not allow light to pass through the stone.
Osmium (Os) ...
Opaque, meaning the stone will not transmit light through it.
Translucent, or cloudy, meaning that the stone transmits light, but you cannot see clearly through it.
Opaque sunstone with snowflakes (photo: Dan Dennis)
The addition of copper provides Oregon Sunstone with a vivid burgundy-red, reddish-brown, mauve, or orange-red color which is sometimes confused with red andesine . Oregon Sunstone can be faceted or cut en cabochon.
Opaque to translucent. Few varieties can be transparent too.
Tetrahedral crystal system.
The medicinal powers of these stones linger a notorious topic, but are stated over the centuries by most healers, and spiritualists, as well. Whether it’s a detail or an excuse, it doesn’t matter, if it truly helps.
Opaque means blocking the passage of light (as opposed to translucent or transparent).
An open-ended necklace has no clasp; it is worn by tying the ends together around the neck. Open-ended necklaces usually have ornaments, like beads or tassels, at the ends.
Opaque variety of quartz with alternating black areas interspersed with lighter-colored lines. Color from silicon dioxide. Mohs' hardness rating of 7.
Opaque - describes substance that does not transmit light.
Orient - describes the depth of luster in pearl; it is created by layers of nacre.
Pavilion - the lower portion of the gemstone.
Opaque chalcedony, impure
Translucent chalcedony with small inclusions (usually mica) that shimmer.
opaque, translucent, and rarely transparent
columnar, prismatic, typically twinned, and rarely massive ...
Opaque stones like onyx are sometimes treated to enhance their natural color and luster. To ensure the finish remains colorfast, do not wear onyx jewelry while bathing or swimming, and avoid using chemicals, detergents, hairspray and perfume near onyx.
A quality that describes gemstones, synthetic jewelry, or painted surfaces that denotes an inability for light to pass through the surface. The opposite quality is translucence. Turquoise or solid paint would be considered opaque.
Opaque stones with good color are cut into cabochons,
or "promotional" grade faceted stones used in inexpensive
Birthstone jewelry. Emerald is a May birthstone.
Opaque variety of quartz and is usually red, yellow or brown. Sometimes with banding or stripes through the stone. 6.5-7.
OPAQUE A solid or non-transparent gemstone such as Onyx or Jade. If some light passes through the stone it would be translucent, not opaque.
OPERA LENGTH A single strand of pearls 30" to 35" in length.
Opaque means blocking the passage of light (as opposed to translucent or transparent).
An opera-length necklace is a single strand that is from 30 to 35 inches (60 to 90 cm) long. Opera-length generally refers to a string of pearls that hangs to the breastbone.
Opaque agate that shows iridescent colors, usually against a brown background. The only significant sources are Mexico and the U.S.
Opal that's transparent or translucent red, orange, yellow, or brown. It may or may not show play-of-color. The most important sources are Brazil and Mexico.
An opaque crypto-crystalline variety of quartz of varying colours, usually red, green, yellow, brown or white. It is of little value and used mostly for inexpensive jewelry and small ornamental objects such as ashtrays and candlesticks.
It is found everywhere, especially in clay.
An opaque light green to blue-green feldspar with a distinctive mottled or striated appearance that is often cut en cabochon.
An opaque form of feldspar
The fossilized resin of prehistoric pine trees which ranges in color from golden to orange-red ...
An opaque-or semitransparent glass or substance applied to a metal surfface for protection or ornamental purposes.
An enhancer attaches to an existing jewelry item to create a new look. Some examples of enhancers include ring enhancers, pearl enhancers, and pendant enhancers.
An opaque mineral, turquoise is used in jewelry worldwide. Named for the ancient trade route that brought it to the European market, turquoise means "Turkish stone." Colors range from sky blue to blue-green to apple green.
The opaque gemstone known as "lapis lazuli" is a mixture of various minerals. The chief component is lasurite, which gives this stone its typical, gleaming blue color. Lapis lazuli usually has stripes or spots of other minerals running through it.
This opaque, deep blue gemstone has a grand past. It was among the first gemstones to be worn as jewellery and worked on.
A semi-opaque stone that was used extensively by the Egyptians it is called the stone of courage and is said to be named after the Amazon women warriors. Some archaeological evidence suggests that the Amazonians were a matriarchal society during the Bronze Age.
A semi-opaque to opaque rose quartz that is usually yellowish, reddish, or brown. The U.S. and Brazil are the most common sources. Jasper was once believed to have curative powers.
Clear to opaque shades of yellow, the golden rutile crystals have a near metallic luster. If quartz is heat-treated, which is often done to achieve a more uniform color, then the rutile will burn away. Rutilated quartz is not as common as other types of quartz.
An opaque stone of microcrystalline fibers belonging to the variety of Spodumene. Come in many colors, white ,green, pink, brown, and violet shades. Sold under the name Jade, even only one is really Jade.
Jade is an opaque stone and is thus usually fashioned into cabochons or beads. Jade bangles and rings are also extremely popular items of jewellery. The stone has held special significance for the people of China since 3000 B.C., when it was referred to as yu or royal gem.
Topaz, both opaque and translucent, can be yellow, red or orange, blue, brown or even gray, the varieties are enormous. Perhaps pink is the rarest version but it is this variety which gives you the chance to select purely on color, perhaps your favorite color.
Jade: An opaque semiprecious gemstone which is usually found in shades of green, but can be also be found in lavender and rose shades.
Jasper is an opaque and fine-grained variety of the silica mineral Chert, that has a dull luster but can be worked to a fine polish. Jasper can be found in a broad variation of colors, like Poppy, Picture, Desert, and Dalmation.
A dark green opaque chalcedony with spots of red Jasper
An outdated term used to describe a diamond without body color, flagrant misuse has made the term meaningless ...
Jasper is an opaque, solid or patterned variety of cryptocrystalline quartz which consists of very tiny quartz crystals colored by various mineral impurities.
Unakite is an opaque mineral that is green with patches of red and pink. Unakite is a variety of granite that contains green epidote and pink feldspar (but lacks mica). It has a hardness of 6 to 7 and a specific gravity of 2.86 - 3.2. Unakite was named for the Unaka Mountains in Tennessee, USA.
Translucent to Opaque Green (most common), Blue, Gray, Yellow and Brown with Aventurescence
Opaque black colored onyx.
Black pearls (also called Tahitian pearls) are dark-colored pearls. They are produced by the large, black-lipped pearl oyster Pinctada margaritifera (also called the Tahitian black pearl oyster), a mollusk found in the tropical Indo-Pacific Ocean.
Minerals may be categorized according to whether they are opaque or transparent. A thin section of an opaque mineral such as a metal will not transmit light, whereas a thin section of a transparent mineral will. The absorption index of an opaque mineral is high.
The transparency may be either opaque, translucent, or transparent. This reflectance property is called luster. Native metals and many sulfides are opaque and reflect most of the light hitting their surfaces and have a metallic luster.
Malachite is an opaque semi-precious stone with layers of deep green and light green. It is usually found in copper mines; malachite is about 57% copper. Malachite was used as jewelry thousands of years ago by the ancients Egyptians. Malachite is usually cabochon set in silver.
Turquoise is an opaque, light to dark blue or blue-green gem. The finest color is an intense blue. Turquoise may contain narrow veins of other materials either isolated or as a network. They are usually black, brown, or yellowish-brown in color.
Opaque: A gemstone that does not allow light to pass through it. Examples would be lapis lazuli and turquoise. Openwork: A style of decoration in which areas of an object have open space or cut cuts. This allows light to pass through an item. It also serves to lighten the overall weight.
Opalescence, Opalescent - Showing an internal play of colors or iridescence. (Opal)
Opaque - Not allowing the transmission of any light through a mineral.
Oxides - Minerals containing a metal and oxygen as the main components. (Cuprite, Corundum) ...
Black Onyx: Opaque black colored onyx.
Black Prince’s Ruby: Not an actual ruby, but a ruby-red color of spinel.
Blemish: A flaw, such as a nick or scratch, on the surface of a stone.
An opaque mineral of iron oxide, ranging in color from deep grey to black metallic
A substance often used as a substitute for tortoiseshell which is from cow horns ...
Turquoise is an opaque stone that has been popular for centuries. Colors range from an expensive "robin's egg" blue to the less valuable green. Turquoise can darken with age and turn greenish. The best quality turquoise is "robin's egg" blue with even color throughout.
howlite - an opaque white ornamental stone veined with black consisting of an aggregate of monoclinic crystals. Has been stained a turquoise-blue color. Found in California.
An opaque gemstone which is greenish-blue in color.
Amazonite. An opaque blue-ish green feldspar. Self-expression, confidence, leadership and communication. May enhance psychic skills. Enhances loves and soothes tense emotions and situations.
Hematite - an opaque gem which is dark gray to almost place in color. Non magnetic. (see lodestone) v
Inclusion - this is a small particle of foreign matter which is contained in a mineral. Many inclusions devalue a stone, but some are prized and make it more valuable - i.e.
Jasper is a common, opaque, semi-precious stone that is found in many colors, including white, brown, yellow, red, and green. Jasper is found all over the world; it is often striped, speckled, and multi-colored. Jasper has been used for intaglio carvings.
Enamel Colored, opaque glassy material fused onto metal, pottery or glass. I have created many beautiful pieces with enamel. Be sure and visit the Carmen's Treasures Store to see.
Malachite is an opaque semi-precious stone with various shades of green, often banded. It is about 57% copper. Malachite was used as jewelry thousands of years ago by the ancients Egyptians. Malachite is usually cut as beads or in a cabochon.
Pleochroism : Yellow to dark green, transparent to opaque
Occurrence: Contact metamorphic limestones and dolomites; magnesium-rich limestones and ultrabasic rocks; regionally metamorphosed rocks. Small, dark transparent crystals
Crystal or stone size: to 10 cts ...
Cabochon cuts are popular with opaque stones and those with asterisms or chatoyancy. In rings, most cabochon cuts feature a rounded dome surface with a flat base. In necklaces or charms, the cabochon cut may more closely reflect a complete sphere affixed with a specialized setting.
AcrylicAcrylics are a type of thermoplastic, and include transparent and opaque in varied colors. Some commonly-known acrylics are lucite and plexiglas. The bangle above is made of confetti lucite. AdamantineAdamantine means having a luster like that of a diamond.
AcrylicA type of thermoplastic, include transparent and opaque in varied colors. AdamantineAdamantine means having a luster like that of a diamond. AdulariaAcommon type of moonstone, a whitish-bluish semi-translucent stone.
on a cap, popular in the middle of the eighteenth century and the early twentieth century A Jour Open setting that leaves the pavilion facets open to the light Alloy A mixture of two or more metals Aluminum A silver white metal that is lightweight and malleable Amazonite An opaque ...
The process is usually used for opaque, semi-opaque, or fragile gemstones that may be difficult to facet. Calibrated:A gemstone that is cut to an industry standard size in order to fit most manufactured jewelry mountings.
5-4 - Treatment: None - Color: Green with color banding Is usually found in opaque green masses, its color derived from copper. Crystals are too small for faceting, but the massive material is carved or polished in many ways to reveal the alternating bands of light and dark green.
The mineral spodumene is generally known in large opaque whitish crystals, but occasionally it appears in small specimens that are transparent and richly colored.
Faceted A faceted stone has small, flat-cut surfaces that make a sparkling effect on transparent stones, although translucent and even sometimes opaque stones are faceted. Traditionally, diamonds, rubies and sapphires are faceted to show off their brilliance.
Sunstone is a variety of Labradorite feldspar that generally shows an opaque "schiller" effect where the metallic inclusions reflect light in a blaze of color. However, it can also come in clear stones which are suitable for faceting.
You are looking for a stone not too transparent, not too opaque. You should be able to see newsprint through the stone, but the type should be blurry. This is called "semitransparent."
Look out for an overabundance of surface cracks.
Translucent jade is more highly valued than opaque jade. Jade is often cabochon set; stones with imperfections are often carved (the imperfections are simply carved away). Two different minerals are known as jade: jadeite and nephrite.
For example, the opaque tin glaze was first developed by the Assyrians about 1000BC. There was a lot of interaction between the Islamic potters and the Chinese, each pushing the other to greater innovation. The Islamic potters of the 9th c.
Apatite is the most collectable mineral at Philips Mine because they occur as translucent to opaque brown, yellow or green crystals up to one and a half inches long. They are best found within masses of pyrrhotite and are closely associated with pyrite often and the contact of these two sulfides.
Jasper: is a fine grained opaque crypto-crystalline variety of Quartz (Chalcedony) that forms in a multitude of varying colors and patterns. Found worldwide, Jasper often contains organic material and mineral oxides which give it interesting patterns, bands and colors.
Aventurine is a translucent to opaque variety of microcrystalline quartz. It contains small inclusions of shiny minerals which give the stone a sparkling effect known as aventurescence. Inclusions of mica will give a silverish sheen, while inclusions of hematite give a reddish or grayish sparkle.
Black Star Diopside is an opaque stone, relatively soft and brittle, that is usually black but is occasionally green.
Transparency: Translucent, opaque
Large pieces of a single color are rare
Sensitive to heat, acids, ammonia, and hot water
Can be found in Zaire, Russia, Australia, Chile, Namibia, Zimbabwe, and Arizona
It was used as a powder for eye shadow by the ancient Romans, Greeks, and Egyptians ...
It is an opaque stone, often found with white, yellow, or gray inclusions and a silky luster or silvery sheen. Both the ancient Egyptians and other Middle Eastern cultures made items from amazonite. It is also been found among artifacts of Pre-Columbian Central and South American.
Jasper, whose name means spotted or speckled stone, is an opaque form of chalcedony. It comes in various colors including red, yellow, brown, green and less often in blue. Jewelry makers find that it provides a myriad of opportunities for use in their designs.
Jasper is an opaque, impure Chalcedony, usually red but also yellow, green, and grayish blue. Association with other minerals gives jasper nice bands and patterns. In the ancient world Jasper was a favorite gem. We can find the name jasper in ancient Hebrew, Assyrian, Greek, and Latin.
Opal occurs in different colors, ranging from semi-transparent to opaque. The most common is white opal. Crystal or water opal has a colorless body. The most valued variety, black opal, has a dark blue, gray, or black body color.
These unique, partially opaque diamonds can be found in faceted form, such as the rose cut. Unlike other diamond cuts, it is flat on the bottom and does not have a pavilion. The crown, or the top part of the diamond, contains facets that meet at a point. This makes the diamond very sparkly! ...
Clarity of colored gems ranges from transparent, semi- transparent, translucent to semi translucent and opaque. Transparency on the other hand is graded in the terms of crystal, milky, cloudy, and sleepy. These terms are mostly used to describe the basic nature of a gem.
At the other extreme, a diamond can be totally black and opaque. In between these extremes, the color brown/yellow increases in intensity from a totally clear D to the beginnings of a faint yellow/brown beginning with J-K grade.
The early glass beads were normally of opaque glass, frequently blue, with decoration often in yellow. The Roman beads followed the Egyptian tradition. In Venice, in the 11th century and subsequently, glass beads were made for trade.
cabochon - An unfaceted form of cutting, used for opaque and translucent stones; the stone is given a rounded, convex shape, and cut high or low for best effect.
JASPER- (14th century) A form of opaque, usually patterned, chalcedony which is found in massive formations. The mineral is usually stained by impurities and occurs in various colors such as red, green, yellow and blue.
It is transparent to opaque and is found in metosomatically altered magnesian or dolomitic limestones in contact-metamorphic aureoles. A blue Tourmaline emanates a high degree of harmony and are reported to bring about openness and tolerance.
A fine-grained quartz, jasper is opaque and most commonly exhibits a brownish-red
color, but it can also appear in green, yellow, brown or black. On Mohs' scale of
hardness, jasper is 6.5-7. Primary sources include Egypt, Australia, Brazil, India, ...
*Earthenware - thick, opaque, porous-bodied dinnerware made from clays that cannot sustain as high a temperature as fine china. Earthenware is generally heavier, and its porous body cannot withstand temperature extremes such as going directly from the freezer to the oven.
See also: Stone, Color, Gemstone, Jewel, Jewelry