Johachidolite can be an very borate that is rare that until a recent discover in Mogok, Myanmar (Burma) ended up being only present in minute grains no bigger than 1 mm in North Hamgyong Province, North Korea. Johachidolite forms transparent colorless, pale yellow, yellow, orange, brown equant subhedral crystals with vitreous lustre. the fabric has robust whitish blue visible light below LWUV. 1st treasure that is faceted created in 1998 from a pale yellow crystal found in the Mogok region (see Journal of Gemmology, 1999, Vol. 26, no. 5). There are currently only a small amount of gems in existence and the source that is only the recent find in Mogok.

Chemical Formula: CaAlB3O7
  Calcium Aluminum Borate
Molecular Weight: 211.49 gm
Composition: Calcium 18.95 % Ca 26.52 % CaO
  Aluminum 12.76 % Al 24.11 % Al2O3
  Boron 15.33 % B 49.38 % B2O3
  Oxygen 52.96 % O    
    100.00 %   100.00 % = TOTAL OXIDE


Crystallography: Orthorhombic – Dipyramidal
Crystal Habit: Equant subhedral crystals, to 1 mm, typically granular and lamellar masses.
Twinning: None


Cleavage: On {201}, a parting.
Fracture: Subconchoidal
Tenacity: Brittle
Moh’s Hardness: 7.5
Density: 3.37 – 3.45  (g/cm3)
Luminescence: Some specimens show strong whitish-blue fluorescence under LW UV and pale blue to purple fluorescence under SW UV, with weak phosphorescence
Radioactivity: Not Radioactive


Color: Colorless, White, Pale Yellow, Yellow
Transparency: Transparent to Translucent
Luster: Vitreous (glassy)
Refractive Index: 1.712 – 1.729  Biaxial ( + )
Birefringence: 0.0140
Dispersion: Relatively Strong; r > v
Pleochroism: None