264.20 CTS PURPLE LABRADORITE SPECIMEN -MADAGASCAR [STS2150]
- Artikelnummer
- Abmessungen (mm)
- 43.700 x 39.400 x 18.300mm
- Gewicht (cts)
- 264.200
- Typ
- Specimen
- Farben
-
Mined at Fort Dauphin Madagascar -Africa
A purple tone in this sspecimen is very unique. This specimen does have a play of purple with other colours.
well polished.
Labradorite a feldspar mineral, is an intermediate to calcic member of the plagioclase series.. The streak is white, like most silicates. The refractive index ranges from 1.555 to 1.575. Twinning is common. As with all plagioclase members the crystal system is triclinic and three directions of cleavage are present two of which form nearly right angle prisms. It occurs as clear, white to gray, blocky to lath shaped grains in common mafic igneous rocks such as basalt and gabbro, as well as in anorthosites.
The iridescence is the result of light refracting within lamellar intergrowths resulting from phase exsolution on cooling in the Boggild miscibility gap.
Gemstone varieties of labradorite exhibiting a high degree of iridescence are called spectrolite; moonstone and sunstone are also commonly used terms, and high-quality samples with good iridescent qualities are desired for jewelry.
- Artikelnummer
- Abmessungen (mm)
- 43.700 x 39.400 x 18.300 mm
- Gewicht (cts)
- 264.200
- Typ
- Specimen
- Farben
-
Mined at Fort Dauphin Madagascar -Africa
A purple tone in this sspecimen is very unique. This specimen does have a play of purple with other colours.
well polished.
Labradorite a feldspar mineral, is an intermediate to calcic member of the plagioclase series.. The streak is white, like most silicates. The refractive index ranges from 1.555 to 1.575. Twinning is common. As with all plagioclase members the crystal system is triclinic and three directions of cleavage are present two of which form nearly right angle prisms. It occurs as clear, white to gray, blocky to lath shaped grains in common mafic igneous rocks such as basalt and gabbro, as well as in anorthosites.
The iridescence is the result of light refracting within lamellar intergrowths resulting from phase exsolution on cooling in the Boggild miscibility gap.
Gemstone varieties of labradorite exhibiting a high degree of iridescence are called spectrolite; moonstone and sunstone are also commonly used terms, and high-quality samples with good iridescent qualities are desired for jewelry.
Versandanbieter | Versand nach:Land | Versand in den Rest der Welt |
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FedEx | $12.00 / :Tage Tage | $39.00 / :Tage Tage |
:Land
FedEx erhält bei Bestellungen mit 2 oder mehr Artikeln einen Rabatt auf $12.00
Rest der Welt
FedEx erhält bei Bestellungen mit 2 oder mehr Artikeln einen Rabatt auf $39.00
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Registered Shipping | $9.00 / :Tage Tage | $16.00 / :Tage Tage |
:Land
Registered Shipping erhält bei Bestellungen mit 2 oder mehr Artikeln einen Rabatt auf $9.00
Rest der Welt
Registered Shipping erhält bei Bestellungen mit 2 oder mehr Artikeln einen Rabatt auf $16.00
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Positiv
Great and clear sapphire, beautiful cut ! Great packaging
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Positiv
AAAA+++ Very Happy! Just like the pic.
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Positiv
AAAA+++ Very Happy! Just like the pic.
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Positiv
Beautiful