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Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Brazilian Emerald

A variety of Elbaite
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Formula:
Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
A deeply-coloured green variety of tourmaline.


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Unique IdentifiersHide

Mindat ID:
43708 (as Brazilian Emerald)
1364 (as Elbaite)
Long-form identifier:
mindat:1:1:43708:8 (as Brazilian Emerald)
mindat:1:1:1364:8 (as Elbaite)

Chemistry of Brazilian EmeraldHide

Mindat Formula:
Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Element Weights:
Element% weight
O53.722 %
Al20.458 %
Si18.253 %
B3.513 %
Na2.490 %
Li1.128 %
H0.437 %

Calculated from ideal end-member formula.
Elements listed:
Al, B, H, Li, Na, O, Si - search for minerals with similar chemistry

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Brazilian EmeraldHide

References for Brazilian EmeraldHide

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