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Lapis is always opaque to semi-translucent and is usually slightly violetish blue. Sometimes, it is almost bluish Violet, but the blue usually predominates. Specks of golden colored pyrite and white calcite are frequently present. "Swiss lapis" and "German lapis" are misleading terms used to refer to jasper or chalcedony dyed blue by the use an ferric-ferrocyanide, or Prussian blue. Calcite or limestone and even inferior lapis are also sometimes dyed and sold under one of these trade names. The following names are used in the American jewelry trade to refer to various qualities of lapis-lazuli:
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Are there any famous examples of the moonstone gem?
a moonstone gem is a stone that looks white like the moon
What is syllable of the third sign of Zodiac?
Gem-in-i
What is the rarest gem in the world?
Painite has been described by the Guinness Book of World Records as the rarest gem mineral. As of early 2005 there have been eighteen known specimens that are all accounted for.
What are black dimonds?
Even a one-carat diamond requires billions of carbon atoms to bond, and all of those atoms must be carbon to create a colorless diamond. The slightest quirk creates a colored diamond: a bit of boron makes a blue diamond; nitrogen makes a yellow diamond; natural radiation form nearby rocks trap electrons to create a green surface color; pink or red shades are thought to be due to changes to the electron structure during the voyage to the surface. However, a black diamond's color is not related to trace elements. Small inclusions of graphite and iron clusters create the "black" color. While other colored diamonds are transparent, the black diamond is typically opaque, and therefore, does not exhibit the fire and brilliance of a white diamond or transparent colored diamond. Since a black diamond necessarily has inclusions, they fracture more easily than some other gem-quality diamonds. They do not cleave as predictably as most diamonds. The difficulties involved with cutting and polishing black diamonds precludes many from becoming gem-quality, and most are declared industrial-use only. Perhaps this helps better define a black diamond ski slope, too. The snow may look white, but there can be hidden "inclusions" that make the path more difficult to navigate safely than other grades of ski slopes.
What is AAA clarity in a diamond?
The annotation 'AAA' is not a typical clarity notation for a gem-quality diamond.
What is the name of the light brown opaque semiprecious gem stone?
Moonstone and Labradorite
Is diamond a transparent translucent or opaque?
Raw diamonds can be transparent, translucent or opaque, depending on their clarity. Gem-quality diamonds are transparent.
Is diamond a translucent material?
Gem-quality diamonds can be said to be transparent to translucent in rough crystals. Industrial diamonds are cloudy -- intensely flawed -- and may be opaque, but are not considered transparent.
What is the difference between the gem and the gemstone?
They are the same thing: reference to a mineral that, when adequately cut and properly polished, are aesthetically pleasing to the eye and can fetch hefty prices. Examples: ruby, amethyst, turquoise, and lapis lazuli
What is a deep blue gem that is native to Afghanistan?
Lapis
Is a gem a rock?
A gem is considered any attractive mineral or rock which when cut and polished, may be used for ornamentation. A gem can be either a mineral or a rock, but most gems are minerals. A rock is an aggregate of many minerals, with no specific structure, while a mineral has a much more ordered atomic structure, with specific physical and chemical properties. A gem is not necessarily a crystal; lapis lazuli is not a mineral or a crystal, yet can still be considered a gem due to its desirable color and traits when polished.
What is the gem of the saggitarius?
Sagittarius have the choice of using: Amethyst, Citrine, Jacinth, Lapis lazuli, Sugilite, Turquoise. Those born in November may want to use Topaz or Citrine , while those born in December may prefer Tanzanite, Zircon or Turquoise .
Is salt translucent or opaque?
A salt is a stable combination of an acid and an alkali. The commonest is our table salt, sodium chloride. In a well prepared specimen, the cubic nature of this compound will be obvious, but it is translucent rather then transparent, but colourless. Some specimens of Calcite are almost transparent. Many salts are quite opaque - probably the majority of them. The silicates present many examples of gem quality salts, and their transparency is part of their attraction.
What is the gem stone for March?
The traditional birthstones for December are Blue Zircon, Blue Topaz, Tanzanite, Turquoise & Lapis Lazuli These are best gemstones for December that are believed to bring good fortune, success, and protection to those born in December.
What is A gem stone with five letters?
Some gem stones with five letters include: - Beryl - Topaz - Agate - Lapis (semi-precious stone, not a gem)
What is a transparencies?
Gem-quality diamonds -- only about 20% of all diamonds mined -- are transparent, some flawlessly transparent. A gem-stone diamond's transparency can range from transparent or sub-transparent to translucent. Industrial diamonds -- 75% of all diamonds mined -- are not transparent at all, but are even cloudy to dull. you can see through it if it is a gem-quality diamond
What is a diamonds transparencies?
Gem-quality diamonds -- only about 20% of all diamonds mined -- are transparent, some flawlessly transparent. A gem-stone diamond's transparency can range from transparent or sub-transparent to translucent. Industrial diamonds -- 75% of all diamonds mined -- are not transparent at all, but are even cloudy to dull. you can see through it if it is a gem-quality diamond
