These natural Green/Red Alexandrites originate from Tanzania and their total weight is about 0.7 carats. The measurements are 3.92mm x 1.97mm x 1.42mm (length x width x depth).These gemstones are calibrated to fit 4 X 2 mm jewelry settings. The shape/cut-style of these Alexandrites is Marquise Facet and has been graded VVS-VS clarity. These 0.73ctw Alexandrite gems are available to order and can be shipped anywhere in the world. Gemstone Certification can also be provided as an optional service.
Alexandrite is one of the rarest of all colored gemstones and is famed for its color change from green in daylight to red under incandescent light. Fine faceted alexandrite over 1 carat is more valuable than sapphire, ruby or emerald.
Alexandrite is a variety of chrysoberyl, with an excellent hardness of 8.5 on the Mohs scale, placing it right behind sapphire and ruby. Alexandrite is rare because of its chemical composition. Chrysoberyl is colored by traces iron and titanium, but alexandrite is also colored by chromium, which gives it the emerald green hue in daylight.
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Weaknesses: Due to the great range of inventory (a strength!), it's hard, even with all the useful filters, to narrow the search parameters enough! Suggestions: Add even more filters, such as "emerald green," not just "green," to your color filter choices. (Yes, just what you wanted, more coding work!)
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