BUYJEM • Factory Direct
Product details
For wholesale: specs extracted from product content and saved fields.
Ship from / originWuzhou Gemstone City
Category
Lab-grown Spinel / Loose Gemstones
Gem type
Lab-Grown Cobalt Spinel
Shape
Square step cut
Size / weight
5×5mm – 10×10mm
Cut
Excellent
Color
Blue
Clarity
VVS
Certificate
AGL/GRC
Growth method (lab)
Czochralski method
Factory / supplier
5 Wuzhou gem processing enterprises
Chemical
MgAl2O4
Hardness
8.2
Refractive index
1.694
Specific gravity
3.58-3.61
Customization
Custom cuts available
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This square step-cut lab-grown cobalt blue spinel offers a vibrant blue color and VVS clarity. Available in sizes from 5x5mm to 10x10mm, it features an excellent cut. Custom cuts are available upon request. It shares all chemical, physical, and optical properties of natural cobalt spinel, with a hardness of 8.2 and a refractive index of 1.694.