34.92CT STUNNING UNTREATED COLLECTOR GEM OPAQUE NATURAL BLUE DOMORTIERITE QUARTZ

Description

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We specialize in collector & high end colored gems not commonly found in retail stores. We strive to provide the best possible customer service and value. We stand behind our products and have the expertise of a GIA Graduate Gemologist to serve you.
Donald Hofler GIA GG, AJP
SEE OUR GROWING SELECTION OF SOME OF THE RAREST GEM STONES AND MINERAS ON EARTH IN OUR STORE. WE OFFER WELL OVER 100 DIFFERENT GEMS, MINERAL, SPECIES AND VARIATIES FOR SALE AND AUCTION AND OUR SELECTION IS GROWING. TAKE A PEAK AND IF YOU HAVE ANY QUESTIONS PLEASE ASK.
Pieces: 1
Shape: Round Cabochon
Type: Natural Blue / Dumortierite Quartz
Color: Mottled Blue
Weight: 34.92 CT
Clarity: Opaque  (Type II)
(
PLEASE; If unsure of what clarity means see chart below for a more detailed explanation also remember colored gems are graded with the naked eye and not a loupe
)
Size:  20.0 x 20.0 x 12.0 mm
Luster: Vtreous
Origin:  Madagascar Africa
Treatment: None
Hardness: 7.0 on MOHS
Dumortierite is a fibrous variably colored aluminum boro-silicate mineral, Al7BO3(SiO4)3O3. Dumortierite crystallizes in the orthorhombic system typically forming fibrous aggregates of slender prismatic crystals. The crystals are vitreous and vary in color from brown, blue, and green to more rare violet and pink. Substitution of iron and other tri-valent elements for aluminum result in the color variations. It has a Mohs hardness of 7 and a specific gravity of 3.3 to 3.4. Crystals show pleochroism from red to blue to violet. Dumortierite quartz is blue colored quartz containing abundant dumortierite inclusions.
VVS 1 & 2
Extra Fine Quality. These gems have microscopic inclusions which are difficult to slightly difficult to see under a loupe with 10x magnification.
VS 1
Very Fine Quality. Small pin-pricks are just visible to the scrutiny of the close naked eye. However, the beauty of the gem is not diminished in anyway.
VS 2
Fine Quality. Small pin-pricks and feathers are just visible to the scrutiny of the close naked eye. However, the overall beauty of the gem is still not diminished.
SI 1
Good Quality. These gems have inclusions, which are fairly easy to see to the close naked eye. However, the overall beauty of the gem is still high.
SI 2
Good to Medium-High Quality. These gems have inclusions which are fairly easy to see under the close naked eye. These inclusions are usually not really visible at an arm's length.
Included
Medium to the lower qualities. Included gems with internal features that range from eye visible to very easily seen to the naked eye.
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