Semi-transparent - One step down from transparent in judging the amount of light that passes through "transparent" gemstones.
Shank - The part of a ring that encircles the finger.
Semi-transparent, prismatic crystals to c.5mms
resting on tiny sprays of thomsonite.
(F. Frattini specimen).
GYROLITE - The Storr, Isle of Skye.
A semi-transparent iridescent gemstone composed of silicon and water which are highly valued because their rainbow like hues display a show of colour within the stone. They diffract light at various wavelengths, creating multiple colours.
Opal A semi-transparent irridescent stone composed of silicon and water. Said to enhance natural abilities, stimulate creativity, and inspire realization of inner potential.
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Jadeite can be semi-transparent to opaque and covers the spectrum from colorless through white, green, yellow, brown, red, orange, violet, to grey and black in color.
Although nephrite jade is China's original "Stone of Heaven," fine jadeite, as in this matched pair of semi-transparent bangles (53.4 mm in interior diameter, 9.8 mm thick), is the most sought-after of jades in the Chinese community today.
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.
OPALS The opal is an unusual stone; it's semi-transparent, not particularly hard and not crystalline in structure. It may shrink in time with loss of water. It is valued for its flashes of iridescent colour.
General opal classifications are: "Boulder Opal" which is opal on a dark ironstone matrix (typical occurrence: Quilpie, Queensland); "Crystal Opal" which is transparent to semi-transparent black, ...
Non-phenomenal chrysoberyl is transparent to semi-transparent, comprising a range of colours.
In the finest qualities, the gems will be semi-transparent and they will exhibit a sharp white eye. As you turn the stone around the eye will move.
As a marketing term in the gemstone industry, "chalcedony" refers more specifically to semi-transparent or translucent chalcedony with a solid color (commonly pale bluish-gray) and nearly wax like luster.
The Crystal structure comprises of hexagonal, trigonal and isometric lattice that transparent or semi-transparent in nature. The hardness of the stone is 9.25 with a Specific Gravity that ranges between 3.1 - 3.2.
CHALCEDONY PATCHES. Milk-like semi-transparent patches which sometimes occur as faults in rubies.
CHANGE OF COLOURS. Manifested in minerals like Labradorite, where the colours change as the stone is turned.
Black Diamond - When a diamond is dark gray, a very dark green or truly black, it is referred to in the trade as a black diamond. Such a stone may be opaque to nearly semi-transparent. Most black diamonds have been treated.
A pearlescent look generally has an illusory depth to it, seemingly of different layers of semi-transparent white and off-white coatings. The appearance of Mother of Pearl is also described as pearlescent.
rutile-like inclusions, referred to as silk, that create the illusion of a six-rayed star inside the ruby. The asteriated effect is clearest in a ruby that is cut as a half-dome shaped cabochon, and is more clearly seen in semi-transparent to opaque ...
One day I went with a number of our Christians for a walk through the hills in the neighborhood of Chanthaburi and I found scattered over them black and greenish stones, semi-transparent (corundum), amongst which were garnets and rubies; ...
Opal is admired for its distinctive play of color, is a semi-transparent solidified mineral composed of silicon and water. Ancient Romans believed opal to be a symbol of hope because it contains the colors of the rainbow.
 See also: Transparent, Stone, Color, Gemstone, Jewel
  
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