OPAQUE:
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 ...
Opaque
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.
Opaque - Not transparent; does not reflect light
Open work - A pattern of openings in an ornamental piece
Overlay - A decorative layer ...
Opaque: A substance which is not transparent or translucent. i.e. a substance that does not allow light to pass through it.
OPAQUE
Opaque means blocking the passage of light (as opposed to translucent or transparent).
OPEN-ENDED NECKLACE ...
Opaque
Not transparent or translucent.
Organic Gem
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
Opaque is the opposite of transparent. Light cannot pass through an opaque material.
Open ended Necklace
Open ended Necklace has no clasps; it either sits on the neck like a cuff or has ties.
Opaque: No light is transmitted.
Translucent: Some light is transmitted.
Transparent: A high proportion of the light is transmitted.
opaque
Something which is not transparent and does not reflect light; dull
oxidation ...
Opaque
The quality of not allowing the transmission of light.
Optic Character
The effect a material has on the transmission on light.
Opaque
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. 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 used for gemstones that you cannot see any light passing through the gem. Lapis and malachite are an example of this.
Opaque - A term referring to the transparency of a gemstone; opaque materials do not transmit light.
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
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 ...
Opaque
Not transparent or translucent; impenetrable to light; not allowing light to pass through.
A style of ring that does not connect in the back. The rings are often used for pinky and toe rings because they are very easy to adjust.
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 [2].
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 to translucent. Few varieties can be transparent too.
Crystal System
Tetrahedral crystal system.
Opaque - A descriptive term for gemstones that are so clouded by flaws that they cannot be considered at all transparent.
Opera - A pearl strand 32 inches in length.
Orient - The iridescent play-of-color that gives pearls their deep inner glow.
Opaque chalcedony, impure
Aventurine
Translucent chalcedony with small inclusions (usually mica) that shimmer.
opaque, translucent, and rarely transparent
Habit:
columnar, prismatic, typically twinned, and rarely massive ...
Opaque stones like onyx are sometimes treated to enhance their natural color and luster.
Opaque
Something which is not transparent and does not reflect light; dull
Oxidation
Metal blackened by a reaction with oxygen. The appearance is accomplished by chemical means.
OPAQUE - Transmitting no apparent light; not transparent.
ORIENT - Minute prismatic sheen on or just below the surface of a pearl or cultured pearl caused by the interference and diffraction of light from the minute crystals comprising the nacre.
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.
K
Kunzite ...
Opaque stones are so "solid" and not "clear" that no light is able to pass through them or be reflected into and out of the stone. Also see translucent and transparent.
opera ...
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
Amber
The fossilized resin of prehistoric pine trees which ranges in color from golden to orange-red ...
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.
Jet ...
It is an opaque mineral consisting essentially of phosphates and is of a colour ranging from sky-blue to apple-green. The best turquoise is, however, dark and should be totally free of any black veins or white specks. It must be cut en cabochon.
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 ...
Jadeite
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.
Pyrites are opaque, brittle crystals with a hardness of about 6 to 6.5 generally appearing in cubes. Pyrites because of their physical property are used in jewelries like necklaces and bracelets.
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.
Jasper is an opaque and fine grained variety of chalcedony quartz. It is typically found in red, yellow, brown or green colors and generally has spots.
A dark green opaque chalcedony with spots of red Jasper
Blue-white
An outdated term used to describe a diamond without body color, flagrant misuse has made the term meaningless ...
Opal: An opaque, translucent or transparent gemstone, always cut en cabochon and sometimes carved. White, grey, yellowish to black body colour. In the finer qualities, opal displays all spectral colours in pin-fire, patchwork or flash patterns.
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.
Jadeite jade: opaque often with mottled colors
Nephreite jade: transparent to opaque, creamy, often with mottled colors
(click on colour to find other gemstones)
TREATMENTS ...
Slag glass, an opaque glass designed to imitate marble, was made by adding slag from iron foundries. The most common color was purple. Browns, greens and blues were made but these were rarer and more expensive.
CLEAR AND BRILLIANT GLASS DECANTERS ...
Opaque black colored onyx.
Black pearls
Black pearls (also called Tahitian pearls) are dark-colored pearls.
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.
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.
Unakite: An opaque stone composed of pink feldspar, green epidote, and quartz. Metaphysical Properties: Emotional balance, spirituality. Facilitates re-birthing process. Good for healthy reproductive system and pregnancy.
Hematite
An opaque mineral of iron oxide, ranging in color from deep grey to black metallic
Horn
A substance often used as a substitute for tortoiseshell which is from cow horns ...
Malachite is an opaque semi-precious stone with inv arious 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.
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.
 See also: Stone, Color, Gemstone, Jewel, Jewelry
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