Adularia
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Physical & Optical Properties
Mohs Hardness
| Mohs | Reference mineral | Adularia |
|---|---|---|
| 1 | Talc | |
| 2 | Gypsum | |
| 3 | Calcite | |
| 4 | Fluorite | |
| 5 | Apatite | |
| 6 | Orthoclase | ● |
| 7 | Quartz | |
| 8 | Topaz | |
| 9 | Corundum | |
| 10 | Diamond |
Crystal System
Value & Market
Where to Buy Adularia
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About Adularia
Adularia is a transparent to translucent variety of orthoclase feldspar prized for its soft, floating internal light known as adularescence. Originally discovered in the Adular Mountains of Switzerland, it is the variety most closely associated with the classic moonstone optical phenomenon. With a pearly, bluish glow that seems to move across its surface, adularia has been used in jewelry since ancient Rome.