Color
Yellow, orange, Red
Green, Red, Blue, Brown, pink
Specific Gravity
3.355-3.433
3.02
Fracture
Uneven
Uneven, Conchoidal
Cleavage
{???} Good, {???} Good
{0001} Poor
Mohs Hardness
-9999
-9999
Chemical Composition
(Ca,Mn2+ ,Fe2+ ) 3Al 2BSi 4O 15(OH)Anthony et al , Handbook of mineralogy (2001)
Ca(Li 2Al)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Pleochroism
In thick sections
Strong: dark brown light brownAnthony et al
Transparency
Transparent
Transparent
Refractive Index
1.690-1.705
-9999
Birefringence
-9999
-9999
Clarity
Transparent
Transparent
Digestive
Supports digestive health
Supports digestive health
Healing
Physical healing
Emotional healing
Qualities Associated
Harmony
Creativity