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4

LABRODITE PENDANT WITH 5 NATURAL STONES 69.90 CTS [GT1461]

UGS
Dimensions (mm)
x x mm
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Couleurs

LABRADORITE SILVER PENDANT

 

This is a natural untreated labradorite  stone surrounded by 5  well cut natural stones.It is a quality finished pendant ready to wear.This material does have natural inclusions and the fire is directional but there is a beautiful flash of colour at the right angles.

Amethyst,Peridot,Garnet.

Size of largest stone 5 x 3 x 3 mm

Size of pendant 43 x 12  x 22 mm app

Size  inside bail 5 mm

Silver stamped 925

Note These are natural  faceted stones with a grading between VVS to VS so dont be confused to cheaper items with imitation stones in them. 

Total weight of pendant 69.90 cts app

Labradorite is truly a fascinatingly beautiful mineral which reminds me of black opal. Its a mineral whose charm is not fully noticed and may be overlooked if not viewed from the proper position. Generally a dull, dark looking mineral with no special virtue until the colorful shiller is observed glowing on the surface. Labradorite can produce a colorful play of light across cleavage planes and in sliced sections called labradorescence. The usually intense colors range from the typical blues and violets through greens, yellows and oranges. 

The color display is from lamellar intergrowths inside the crystal. These intergrowths result from compatible chemistries at high temperatures becoming incompatible at lower temperatures and thus a separating and layering of these two phases. The resulting color effect is caused by a ray of light entering a layer and being refracted back and forth by deeper layers. This refracted ray is slowed by the extra travel through the layers and mixes with other rays to produce a light ray coming out that has a different wavelength than when it went in. The wavelength could correspond to the wavelength of a particular color, such as blue. The effect depends on the thickness and orientation of the layers. If the layers are too thick or too thin no color shiller is seen. Also if the viewer does not observe from the precise angle or if light is not supplied from the proper angle then no color shiller is seen. The labradorescence is truly a one of a kind mineralogical experience and must be observed in person in order to truly appreciate its beauty.

Labradorite is a member of the plagioclase series of minerals. The plagioclase series comprises felspars that range in chemical composition from pure NaAlSi3 O8 to pure CaAl2 Si2 O8 . Labradorite is defined at approximately the 50% to 70% CaAl2 Si2 O8 . Labradorite by definition must contain 50-70% calcium to 50-30% sodium in the sodium/calcium position of the crystal structure. All members of the plagioclase series usually display lamellar twinning called "Albite Twinning". The twinning is caused by a error in the crystal structure during its growth.

 

 

 

 

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  • royrock
    royrock
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    Beautiful agate piece , and as always fast efficient service from Sedagems

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Aperçu

Type d'inscription : Standard
Identifiant du produit : 563035
Départs : 9th November 2024 05:00 pm PST
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