[DOC] [TLE] Amethyst - Wikipedia [PAR] Amethyst is a violet variety of quartz often used in jewelry. The name comes from 
the ancient ... Amethyst is a semiprecious stone and is the traditional birthstone 
for ... There is one test based on "Brazil law twinning" (a form of quartz twinning ... 
considered precious above all others, until large deposits were found in Brazil. [DOC] [TLE] Amethyst - International Colored Gemstone [PAR] For many thousands of years, the most striking representative of the quartz family 
... A large number of further miraculous powers are attributed to the amethyst in 
all ... However, the most beautiful of all crystal quartzes also posed one or two ... 
The South American deposits in particular, which were not discovered until the... [DOC] [TLE] Paraiba Tourmaline - International Colored Gemstone [PAR] It was not discovered until very recently, that is to say in the 1980s. ... a handful of 
the finest tourmaline crystals were brought up into the daylight from one of the ... 
was lacking - that is, until the discovery of that precious deposit in Paraiba. ... 
mixture of copper and manganese can also result in pale grey to violet-blue 
tones. [DOC] [TLE] Amethyst Gemstone Information at AJS Gems [PAR] Amethyst is a purple variety of quartz, which ranges in color from a light violet to 
an ... the highest quality amethyst gems and many other precious colored stones 
from ... With a loose stone you can much more easily inspect the gem and see it 
for .... The South American deposits in particular, which were not discovered until
... [DOC] [TLE] Green Gemstones: List of Green Precious Gem Types for Jewelry ... [PAR] Jul 2, 2014 ... Agate is one of the many quartz gemstone varieties, more specifically, ... 
However, since large stones are incredibly rare, most alexandrite is limited to ... 
Amazonite jewelry is extremely popular in South American countries. .... Since 
the more recent discoveries of kornerupine deposits were found in Africa,... [DOC] [TLE] The Rocky State of Your Campaign #5: Top Gems versus Paltry ... [PAR] Feb 17, 2009 ... Top-quality stones today are more valuable than diamonds. ... were forms of 
rubies right up until the 19th century, and this included ... Usually only tiny 
fragments are found but once in a while a larger gemstone is retrieved from one 
of .... of deposits from Brazil, sparking new exploration of South America. [DOC] [TLE] Gold Karat - Zales [PAR] The closer the stone comes to colorless, the more valuable it is. ... In jewelry 
pieces with more than one diamond, the carats may be described in terms of total 
... From the time gemstones were discovered, they were believed to have ... 
Amethyst was a valuable gem until the discovery of large deposits in South 
America in the... [DOC] [TLE] Gem Stones of the United States - USGS Publications Warehouse [PAR] Many semiprecious, but few precious, gem stones have been found in the ... Only 
the ruby, sapphire, spinel, emerald, rutile, and quartz of gem ... rocks, especially 
granite and pegmatite deposits. ... Rarity is one of the most important factors in 
establishing the .... low point, was invented and used for cutting large diamonds. [DOC] [TLE] Tanzanite: What you need to know about color, rarity, value [PAR] Tanzanite is a rare blue gem and a popular alternative to blue sapphire. It is 
mined commercially at only one location in Tanzania. ... of years, tanzanite was 
not discovered in commercial quantities until the 1960s. ... Tanzanite gems with a 
strong-to-vivid blue, purplish blue and violetish blue color are the most valuable. [DOC] [TLE] Gemstone Guide | Jewelry Education | Acori Diamonds & Design [PAR] Your guide to gemstones at Acori Diamonds & Design in Friendswood, TX. ... (
Semi-Precious Stone) ... found in Russia until deposits were uncovered in South 
America around the turn of the twentieth century. ... Amethyst | member of the 
quartz family .... Most who want a sapphire will be able to find one, however very 
large,... [DOC] [TLE] Knowledge Center - Stone Types - Dakota Stones [PAR] It's an opaque stone often found with

Question: This violet quartz gem was one of the most precious until large deposits were found in South America
Answer: Amethyst