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Watches:
MGR872893

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Classic Locality

Description Tabs

Description
Locality: 
Brumado, Bahia, Brazil
Class: 
Single Crystal
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 1.9 × 1 cm
Description

The crystal is sharp terminated and lustrous, the reverse was on the rock. It needs backlight, but then it shows incredible internal color - not only green, there is also a dark red center.

Mineral Data
What's on the rock

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Formula: 
Ca(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)
Group Parent: 
Tourmaline
Crystal System: 
Trigonal
Hardness: 
7.5
Colour: 
Black, greenish-black
Streak: 
Light-brown, light-green, or white