Yes, I am for clear, logical gem/mineral names too, but the marketplace - and some well-meaning collectors and miners - can make things confusing. thanks for any help and information you can offer.Ĥth Jun 2006 21:21 UTC Rob C. A further question - if green amethyst is natural and not heat treated as standard, why is it called green amethyst and not simply referred to as green quartz or some other name that doesn't make it sound like a derivative of a purple stone? I haven't been able to find references for prasiolite or green amethyst anywhere on mindat. On all accounts, however, I am told it is mined in Brazil and i have not heard of other sources for this stone. *is* green amethyst heat treated or naturally pale sage green? I have been told by various sources in gemstone dealership that it is a) ordinary amethyst mined in brazil which turns green when treated with heat and *never* occurs naturally as a green stone and b) that prasiolite is an entirely natural green stone which is pulled from the earth already in possession of this ethereal light green colour. I have searched the message boards and have not turned up this question as already answered, so I do apologize if this has already been addressed in the past. Recent Images in DiscussionsĤth Jun 2006 14:18 UTC Freya Reinsch Hi all - I hope someone can help me answer this once and for all as I keep getting conflicting information on the subject. Currier Digital LibraryOpen discussion area.
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Topaz - Harder (8), has perfect cleavage, different crystal formation.Ĭhrysoberyl - Harder (8½), different crystal formation.Īpatite - Softer (5), crystal terminations usually differ from Citrine.įluorite - Much softer (4), different crystal formation. In Boekenhoutshoek (Magaliesberg), Mkobola district, South Africa, a unique form of natural Citrine is found together with Amethyst that has a spiky overgrowth of small crystals popularly called "Cactus Quartz". Other locations where natural Citrine is found is San Cristobal, Santander, Colombia Lubumbashi in Katanga (Shaba), Congo (Zaire) Antananarivo Province, Madagascar Salamanca, Spain and Dauphine, France. Most commercial gem-grade material comes from Rio Grande do Sul and Minas Gerais, Brazil, but almost all of the Brazilian material is heat treated Amethyst.Ī classic exhausted locality for natural Citrine is Olkhovka in the Northern Ural Mountains, Russia. Natural Citrine is not common and occurs sparingly in many large Quartz deposits. Citrine is also popular among mineral collectors, and small pieces and drusy plates are often sold to amateur collectors in gift shops. Gems are faceted for jewelry, and it is often used as an inexpensive substitute for Topaz. Yellow, yellow-brown, orange, dark orange-brown, reddish-brownĬitrine is known mainly for its use as a gemstone.
Sometimes Citrine has a "smoky" hue to it, and can be borderlined between Citrine and Smoky Quartz, with either definition being correct.įor additional information, see the gemstone section on Citrine. Natural light yellow Citrine is often called "Lemon Quartz" on the gemstone market. Virtually all heat-treated material has a reddish tint, whereas the natural specimensĭo not. Natural Citrine, which is rare, is yellow to orange-yellow, and occurs in much lighter hues than the heat-treated material, which is dark orange-brown to reddish-brown. In some Amethyst deposits, the Amethyst has been partially or fullyĬhanged over to yellow Citrine by natural means of heating. Citrine may also be produced by heat-treating Smoky Quartz from certain Most Citrine is formed by heat treating purple Amethyst. It is a widely used as a gemstone, and after Amethyst it is the most popular Quartz gem. Citrine is the yellow to brownish-red variety of the mineral Quartz.
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