-(boule).svg)
trigonal synthetic
Synthetic Sapphire (Verneuil) (Boule)
Al2O3:Fe,Ti
Quick Facts
Hardness
9.0
Specific Gravity
3.99
Refractive Index
1.762
Crystal Structure
trigonal[-3m]:{10-10}@1.0 + {10-11}@0.7 | elongate(c:1.8) trigonal
-3m
{10-10} {10-11}
Physical Properties
Crystal Systemtrigonal
Hardness (Mohs)9.0
Specific Gravity3.99
CleavageNone (parting on {0001} and {10-11})
FractureConchoidal
LustreVitreous to adamantine
Optical Properties
Refractive Index1.762
Birefringence0.008
PleochroismStrong dichroism - violetish-blue / greenish-blue
Dispersion0.018
Origin & Identification
Originsynthetic
Growth Methodflame fusion
Interactive Preview
Open this crystal in the CDL Playground to rotate, export, and explore in 3D.
Open in Playground trigonal[-3m]:{10-10}@1.0 + {10-11}@0.7 | elongate(c:1.8) Natural Counterpart
The natural gem this synthetic imitates
Related Minerals
Other minerals in the trigonal system
