Sapphire -Blue - Heat Treated-Phillipsburg, Mont.

Type: Sapphire Heat Treated

Origin: Missouri River, Montana, USA

Weight: 0.75

Color: Blue - heated Phillipsburg

Cut: Round (SRB -73)(Bev)

Clarity: VVS

Size: 5.28 mm

Treatments: No known treatment

Genealogy: FOco Mined, Heat treated,  and cut.

Hardness: 9

Source: Boston Bar Mine

Comments: This is a lively stone. Original rough: 3.4 Cts was cut into a 0.75 cts stone retaining about 22% of the original.

Fracture low on pavilion near Girdle. Good spot stone is secure but tell the setter to be gentle setting any prongs (as they should be anyway).