|Dimensions (mm)||not provided|
|Weight (carats)||not provided|
THE CROSS STONE.
This is a natural untreated stones' parcel mined in Russia .They are drilled .
Weight 106 cts app
Size 19x19x7.7 mm round
The mineral chiastolite is a variety of andalusite. It is noted for distinctive cross-shaped black inclusions of graphite. The chiastolite crystals have been pseudomorphically altered by a mixture of muscovite, paragonite and margarite. The calcium rich margarite tends to form along the graphite rich crosses or bands within the chiastolite. Mineralogically the occurrence is important because all three white mica phases are present in an equilibrium assemblage.
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