Mineral Information and Data:

Sinhalite
MgAlBO4 [CNMNC approved formula]

Named for Sinhala, the Sanskrit name for Ceylon.

IMA status : Valid species (Pre-IMA) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
24.01.01.01  
  (24) Borates - Anhydrous
  (24.01) where (A)2 XO4
  (24.01.01)
  
Nickel-Strunz
(10th edition) :
06.AC.05
  (06) Borates
  (06.A) Monoborates
  (06.AC) B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc
  
Crystal system: Orthorhombic System
Point group (H-M): mmm (or 2/m 2/m 2/m) — dipyramidal
  
  
  
Other Properties: Gemstone Rare.

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