colour change
See dichroism
composite suite
A piece of jewellery that is composed of more than one part, where each part may be worn separately or together as a single piece ...
Green, colour change, orange, red & yellow
Family
Feldspar: (Na,Ca)AlSi3O8 ...
Name for rare colour change diamonds.
Champagne
Apart from the world famous French origin-marked sparkling wine sparkling wine, ...
After the intense colour change, look for the inclusions and flaws. Usually, it is a clear translucent stone with very minute inclusions.
When the Russian deposits were thought to have been exhausted, interest in the unique colour miracle decreased - especially since alexandrites from other mines hardly ever displayed the coveted colour change.
If the colour changes when the light source does, the stone is called a pink or shocking pink Tourmaline.
A premium is placed on gems that contain strong colour change qualities, since with alexandrites a predominantly "muddy" mix of greens, browns and reds tends to be the norm, resulting in a vague colour change.
Alexandrite: A variety of chrysoberyl, extremely rare in finer qualities, with gems of Russian origin commanding the highest premium. Ideal colour change is a red hue under incandescent light and green in daylight.
It is a grey, iridescent stone with flashes of green, red, yellow or - more rarely - blue or purple. The colour changes as the stone is turned.
small and en cabochon, and clustered together on brooches, hair pins and rings can be found in many antique shops and markets. Garnet, however, has many faces and can be green (Tsavorite and Demantoid), orange (Mandarin) and purple (colour change ...
today it is not only the classical gemstone colours red and green which are so highly esteemed, but also the fine hues in between. Furthermore, the world of the garnets is also rich in rarities such as star garnets and stones whose colour changes ...
 See also: Gemstone, Colour, Stone, Gemstones, Jewel
  
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