Rich Violet Gemstone ,Iolite Gemstone, Iolite small oval, 4 x 6 oval, Violet Gemstone, Purple Gem,52 ct, sale

$48.00
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$48.00
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Preparation takes 1-3 business days
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Each gemstone I have collected especial and some I have identified myself out of mixed lots. Others I bought specifically with Chantaburi, Thailand Laboratory Certificates.

.52 ct oval iolite
purple/blue (rich violet)
4 x 6 oval
Clarity: I (some imperfections visible to the eye without magnification)
good depth( see mirror image)
Violet is such a delicate but powerful colour, being that of the crown chakra(meaning it entails spiritual meanings), that I see it set in a lovely, delicate, ornate ring.
The gemstone you see here , as usual, is the gem you are purchasing. My prices are a bit lower than many popular larger jewelry and gemstone suppliers, as well you are sure to be getting the stone pictured. 100% guaranteed.


Returns are accepted After you have messaged me and arranged proper method of mailing return. You have 5 days from receipt to inspect them, if not to your satisfaction, you then message me for a return authorization, thus insuring I am aware the gem is again in transit and I can follow the tracking number. Gems over 100.00
USD must be insured both ways.

Some things I have found about iolite from Wiki are:As the transparent variety iolite, it is often used as a gemstone. The

name "iolite" comes from the Greek word for violet. Another old name

is dichroite, a Greek word meaning "two-colored rock", a reference to

cordierite's strong pleochroism. It has also been called "water-

sapphire" and "Vikings' Compass" because of its usefulness in

determining the direction of the sun on overcast days, the Vikings

having used it for this purpose.[7] This works by determining the

direction of polarization of the sky overhead. Light scattered by air

molecules is polarized, and the direction of the polarization is at right

angles to a line to the sun, even when the sun's disk itself is obscured

by dense fog or lies just below the horizon.[8]

Gem quality iolite varies in color from sapphire blue to blue violet to

yellowish gray to light blue as the light angle changes. Iolite is

sometimes used as an inexpensive substitute for sapphire. It is much

softer than sapphires and is abundantly found in Australia (Northern

Territory), Brazil, Burma, Canada (Yellowknife area of the Northwest

Territories), India, Madagascar, Namibia, Sri Lanka, Tanzania and

the United States (Connecticut). The largest iolite crystal found

weighed more than 24,000 carats, and was discovered in Wyoming,

US.[9]


Catalytic converters are commonly made from ceramics containing a

large proportion of synthetic cordierite. Corderite is the raw

material from which iolite gems form. The manufacturing process

deliberately aligns the cordierite crystals to make use of the very low

thermal expansion seen for one axis. This prevents thermal shock

cracking from taking place when the catalytic converter is used.

Another name for blue iolite is Steinheilite, after Fabian Steinheil, the

Russian military governor of Finland who observed that it was a

different mineral from quartz.[1

General
Category Silicate mineral
Formula
(repeating unit) (Mg,Fe)2Al4Si5O18
Strunz classification 09.CJ.10
Dana classification 61.02.01.01 Cordierite group
Crystal symmetry 2/m 2/m 2/m Orthorhombic - Dipyramidal
Unit cell a = 17.079 Å, b = 9.730 Å, c = 9.356 Å; Z = 4
Identification
Color Blue, smoky blue, bluish violet; greenish, yellowish brown,

gray; colorless to very pale blue in thin section
Crystal habit Pseudo-hexagonal prismatic twins, as imbedded

grains, and massive
Crystal system Orthorhombic - Dipyramidal Space Group: C ccm
Twinning Common on {110}, {130}, simple, lamellar, cyclical
Cleavage Fair on {100}, poor on {001} and {010}
Fracture Subconchoidal
Tenacity Brittle
Mohs scale hardness 7 - 7.5
Luster Greasy or vitreous
Streak White
Specific gravity 2.57 - 2.66
Optical properties Usually optically (-), sometimes (+); 2V = 0-90°
Refractive index nα = 1.527 - 1.560 nβ = 1.532 - 1.574 nγ = 1.538 -

1.578 Indices increase with Fe content.
Pleochroism X = pale yellow, green; Y = violet, blue-violet; Z =

pale blue
Fusibility on thin edges
Diagnostic features Resembles quartz can be distinguished by

pleochroism. Can be distinguished from corundum by its lower

hardnes



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