GIA Certified 15.42 ct AAAA Very good Cushion Cut (14 x 14 mm) Genuine D'Block Tanzanite Gemstone
FREE GIA Certificate! IF Quality Bluish Violet Tanzanite 100% Natural Genuine Mined from Earth Gemstone!!!
Gem Type
Tanzanite
Color
Bluish Violet
Shape
Cushion
Size (LxWxD)
14.08 x 13.97 x 10.10 mm
Weight
15.42 ct
Grade
AAAA
Hardness
6.5
Luster
Excellent
Clarity
IF
Treatment
Heated
Origin
Tanzania
RefractiveIndex
1.69-1.70
Specific Gravity
3.35
FL
IF
VVS1
VVS2
VS1
VS2
SI1
SI2
L1
L2
L3
L4
Flawless Internally Flawless
Very Very Slightly Imperfect
Very Slightly Imperfect
Slightly Imperfect
Imperfect
Opaque
Tanzanite Mohs Hardness - 6.5-7 Found in - Mererani, Tanzania History - Tanzanite is a blue zoisite which is trichroic - meaning it often shows different colors when viewed from different directions. In 1967 a rich violet-blue transparent type of zoisite was discovered in Tanzania. The stone was named after this, the only country they are found, two years later. Tanzanites are now found in blue, green,yellow, pink, and brwon, but all will change to a blue color when heated. The stone was added to the official December birthstone list in 2004. It has a low resistance to ultrasound, therefore, do not clean with ultrasonic cleaner. Zoisite was first discovered by Baron von Zois in Austria, and called Saualpite. Metaphysical - thought to stabilize emotions, for grounding, security, brings happiness, enhances communicative abilities,