Alabaster is a name used for gypsum and calcite but has also been used to indicate selenite. These minerals are easily worked due to their low hardness and have been used to craft all sort of things from since antiquity. Think of sculptures, household items and, of course, jewelry.
Cameos composed of alabaster carvings set on onyx backings are regularly encountered in vintage jewelry.
Alabaster Carving on Onyx Background.
Gemological Information for Alabaster
|Color:||Dark Brown, Light to Dark Green, Yellow & Black|
|Refractive Index:||1.520 - 1.529|
|Hardness:||2 to 2.5|
|Similar Stones:||Calcite Marble|
|Treatments:||Dyeing, Heat in Preparation for Dyeing, Bleaching|
|Country of Origin:||U.S., Canada, Italy, United Kingdom, Mexico|
|Warm Soapy Water:||Safe but no Abrasives|
|Chemical Attack:||Dissolves in Acid|
|Heat Sensitivity:||Dehydrates and Crumbles|