0.34 ct Good-looking Round Shape (4 x 4 mm) Green Yellow Sphene Gemstone

Description

0.34 ct Good-looking Round Shape (4 x 4 mm) Green Yellow Sphene Natural Gemstone
Genuine & Mined From Earth! VS Quality Green Yellow Stone
100% Natural Genuine & Mined from Earth Gemstone !!!
Gem Type
Sphene
Color
Green Yellow
Shape
Round
Size (LxWxD)
4.36 x 4.39 x 2.41 mm
Weight
0.34 ct
Hardness
5.0
Luster
Excellent
Clarity
VS
Treatment
Un-Heated
Origin
Pakistan
RefractiveIndex
1.84-2.03
Specific Gravity
3.53
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
Sphene
Mohs Hardness - 5 Found in - Russia & Pakistan Titanite, or sphene (from the Greek sphenos, meaning wedge), is a calcium titanium nesosilicate mineral, CaTiSiO5. Trace impurities of iron and aluminium are typically present. Also commonly present are rare earth metals including cerium and yttrium; calcium may be partly replaced by thorium. The International Mineralogical Association Commission on New Minerals and Mineral Names (CNMMN) adopted the name titanite and 'discredited' the name sphene as of 1982, although commonly papers and books initially identify the mineral using both names. Sphene was the most commonly used name until the IMA decision, although both were well known. Some authorities think it is less confusing as the word is used to describe any chemical or crystal with oxidized titanium such as the rare earth titanate pyrochlores series and many of the minerals with the perovskite structure. The name sphene continues to be publishable in peer-reviewed scientific literature, e.g. a paper by Hayden et al. was published in early 2008 in the journal Contributions to Mineralogy and Petrology. Sphene persists as the informal name for titanite gemstones.
On Feb-09-21 at 21:42:15 PST, seller added the following information:
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