Alexandrite Gemstone

The debate continues as to which origin produces the finest, most eye-pleasing natural alexandrite mined stones. Even though buyers are extremely interested in learning of the country of origin of their alexandrite, most gemological labs do not have a test to verify the origin of an alexandrite! Therefore, it may come as a surprise that when asked, those of us with experience must often make an educated guess based on certain characteristics sometimes seen in stones from specific regions.
Alexandrites were once mined only in Russia, and while Russia has long been thought of as "the place" for alexandrites, we know from experience that the quality of the individual specimen is what matters, not the origin.
For decades the word was that any material that wasn't Russian mined was considered inferior, and even today some people prefer only stones that are of alleged Russian origin. However, in the 1980's a Brazilian find shook the gem world with its high quality and brilliant color change from a striking bluish green to magenta!
A find of good quality material followed in India years later. The Brazilian and Indian material is generally of better color change quality than the later discovered Tanzanian material, although any location where gems are mined will produce some material of better quality, some of lesser quality. That is why a specific country of origin does not necessarily determine an alexandrite's value.
Although the optimal color change in an alexandrite would be from a brilliant emerald-like green to a ruby-like blood red, gemological experts agree that contrary to what many people believe, there are very few alexandrites which change color to a true ruby red under everyday household lighting! There is a wide range of lovely colors to be seen in these amazing stones and the few that do change from deep green to burgundy are often dark in tone, opaque or highly included, so that many consider them unattractive.
It is important to note that the old saying "emerald by day, ruby by night" was coined in the days when the light from a candle or fire were the only sources of nightime lighting available. By the light of a candle or flame most alexandrites will exhibit considerable reddish tones, but not under today's bright or "soft white" household bulbs! It is only by candlelight or firelight that the most dramatic color change from green to reddish purple will be seen.
What you should look for in a quality natural mined alexandrite is a shade of teal, emerald or forest green under natural daylight or fluorescent lighting, ideally changing to a soft amethyst purple under regular incandescent bulbs, but more often a slightly grayish, bluish violet is seen, again more closely resembling a tanzanite or a purple sapphire than a ruby. The color will usually deepen to plum by very low incandescent light. Dim the lights altogether and pink, red or lovely magenta highlights will be evident by the light of a candle or flashlight, which is the true test of color change and a gemologist grading an alexandrite will not be able to see the full and complete color change unless they take the time to do this.
Of one thing you can be sure - every alexandrite is an individual and it is rare to find two that display exactly the same colors under a variety of lighting conditions. This characteristic of individualism is due to a combination of factors, including variances in clarity and color, as well as the shape and cutting of the stone, and makes alexandrite all the more valuable and endearing to collectors.
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Exotic Gems, Volume 2: How to Identify and Buy Alexandrite, Andalusite, Chrysoberyl Cat's-eye, Kyanite, Common Opal, Fire Opal, Dinosaur Gembone, Tsavorite, Rhodolite & Other Garnets $16.00 This is a full-colour guide to identifying and evaluating alexandrite, andalusite, chrysoberyl, cat's-eye, kyanite, sillimanite, common opal, fire opal, dinosaur gembone, tsavorite, rhodolite, spessartine, demantoid, malaya, grossular, and other garnets. This is the second in a series of books that explores the history, lore, properties, qualities and geographic sources of lesser-known gems. The b... |
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Alexandrite: The Legend of a Siberian Stone "Alexandrite" is a precious stone found in the ural mountains in 1833 and named after czar alexander II who, at the time of the discovery, was heir apparent to the russian throne. "Alexandrite: The Legend of a Siberian Stone" is a translation from the original russian about the early history surrounding this unique gemstone.... |
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