Chrysocolla is a copper mineral that gives it a bluish-green color. Chrysocolla has been known to mankind since ancient times. The mention of chrysocolla is found in the writings of Theofast, dating back to the 4th century BC. Chrysocolla is also called the Eilat stone in honor of the mines of King Solomon near the Gulf of Eilat. But in the Eilat stone, chrysocolla is just veins in the sandstone. Chrysocolla has been a popular gemstone from prehistoric times to the present day.
You can see chrysocolla stone for sale and buy it in the Minerals of Russia online store.
|Category||Phyllosilicate mineral mineraloid|
Unknown space group
|Unit cell||a = 5.7 Å, b = 8.9 Å,
c = 6.7 Å; Z = 1
|Color||Blue, cyan (blue-green), green, blackish blue to black, or brown and rarely yellow|
|Crystal habit||Massive, nodular, botryoidal|
|Tenacity||Brittle to sectile|
|Mohs scale hardness||2.5–3.5 (7 for chrysocolla chalcedony, high-silica content)|
|Luster||Vitreous to dull|
|Streak||white to a blue-green color|
|Diaphaneity||Translucent to opaque|
|Optical properties||Biaxial (-)|
|Refractive index||nα = 1.575–1.585 nβ = 1.597 nγ = 1.598 - 1.635|
|Birefringence||δ = 0.023–0.050|