moonstone 9mm

Kuukivi / moonstone

Tuotetta rajoitettu erä.

18,72 €

Sisältää alv. 25.5 %

Saatavuus Varastossa

Tuotenumero 150010

Tuotekuvaus

Moonstone

kuukivi

Alkuperä (todennäköinen) : Itä - Afrikka

Paino ( ct noin ) : 2

Mitat ( mm noin ) : 9 x 7 x 4,3

Hionta : cobochon

Puhtaus : TL

Erinomainen Erittäin hyvä Hyvä ”kakkosluokkaa”

Hionta X

Loisto X

Väri X

Ominaista : kirkas kuukivi, jossa utuiset loisteet

hakusanoja:moonstone,kuukivi,pyöreä

Moonstone is the most well known variety of orthoclase feldspar. It characteristically exhibits a milky floating blue light known as adularescence or the schiller effect. This lovely sheen is due to a combination of orthoclase and albite arranged in layers. Light reflected from the layers if they are not too thick is responsible for the unusual optical properties.

Known Facts
Color Key:	white, blueish white.
Refractive Index:	1.518 – 1.526
Chemical Composition:	KalSI3O8
Hardness:	6 – 6.50
Density:	2.55 – 2.57
Crystal Group:	Monoclinic
Ocurrence:	Sri Lanka, India, Madagascar, Burma, Tanzania, U.S.A.
Moonstone is usually fashioned en cabochon with the blue colors commanding higher prices. A new kind of moonstone has also been recently discovered in Tanzania. Potassium-feldspar (K-feldspar) alcali feldspar, or moonstone with weak asterism, the stones exhibit cat's eyes with a weaker ray perpendicular to the eye producing a four ray star in some specimens. We call it "sunstar".