MIXED GEMS FROM TANZANIA

These are well polished cabachone stones that have been cut in Tanzania by experienced cutters ready to be set in jewellery.There are Tanzanites (purple), Tsavorite garnet (green) and Spinel (pink)

Popular colours

Mohs scale 6.5 to 7

Grading VVS

Weight. 0.71 cts app

Size 5 x 5 x 2 mm to 3 x 3 x 2 mm app

Type 1 Gemstones

The following gemstones are typically inclusion free, even minor inclusions detract from their value.

Diamond, Amethyst, Beryls(Aquamarine,Morganite), Citrine, Smoky Quartz, topaz, Chrysoberyl, Kunzite, Tanzanite, green Tourmaline, and Blue Zircon

IF      Internally flawless under extreme magnification (Very rare)

F       Flawless

VVS    Minute inclusions under 10x; invisible to the unaided eye

VS      Minor inclusions under 10x; usually invisible to the unaided eye

SI1    Noticeable inclusions under 10x; usually visible to the unaided eye

SI2    Noticeable inclusions under 10x; usually quite visible to the unaided eye

I1      prominent- moderate affect on appearance or durability

I2      prominent - severe affect on appearance or durability

I3      prominent- severe affect on beauty, transparency or durability

Type 2 Gemstones

Gemstones that normally have small inclusions that do not detract from value.

Alexandrite, Andalusite, Iolite, Peridot, Rhodolite, Ruby, Sapphire, Spinel, Tourmaline, Garnet, Amethyst, Red Zircon, Tsavorite; Blue, Orange, Purple, Fluorite.Yellow and Parti-colored Tourmaline

F       Flawless

VVS    Minor inclusions under 10x; usually invisible to the unaided eye

VS      Noticeable inclusions under 10x; often invisible to the unaided eye

SI1    Obvious inclusions under 10x; visible to the unaided eye

SI2    Obvious inclusions under 10x; very apparent to the unaided eye

I1      prominent - moderate affect on appearance or durability

I2      prominent - severe affect on appearance or durability

I3      prominent - severe affect on beauty, transparency or durability