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.
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 ...
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 (adj, n) generally speaking, that which is not transparent, impenetrable to light. In context of gemmology, a non-transpararent gemstone such as turquoise or jasper.
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.
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: A substance which is not transparent or translucent. i.e. a substance that does not allow light to pass through it.
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 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 - A term referring to the transparency of a gemstone; opaque materials do not transmit light.
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 ...
Not transparent or translucent; impenetrable to light; not allowing light to pass through.
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 .
Opaque to translucent. Few varieties can be transparent too.
Tetrahedral crystal system.
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.
The medicinal powers of these stones linger a notorious topic, but are stated over the centuries by most healers, and spiritualists, as well.
Opaque variety of quartz with alternating black areas interspersed with lighter-colored lines. Color from silicon dioxide. Mohs' hardness rating of 7.
Opaque means blocking the passage of light (as opposed to translucent or transparent).
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.
Something which is not transparent and does not reflect light; dull
Metal blackened by a reaction with oxygen. The appearance is accomplished by chemical means.
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 agate that shows iridescent colors, usually against a brown background. The only significant sources are Mexico and the U.S.
Fire Opal ...
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.
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 ...
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.
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.
Jasper - opaque, dull red (FeO); also green, dull blue, or black
Ribald Jasper - general term for banded Jasper
Chert - White, gray or black, glassy, and containing fewer impurities than jasper. Not usually a gem material ...
Naturally opaque to translucent, blue quartz is relatively rare and may have fractures of reddish brown created by iron oxide.
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.
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 ...
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.
French for gold plated silver.
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.
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.
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.
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 ...
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.
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.
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.
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.
See also: Stone, Color, Gemstone, Jewel, Jewelry