Albite is a plagioclase feldspar mineral. It is the sodium endmember of the plagioclase solid solution series. As such it represents a plagioclase with less than 10% anorthite content. The pure albite endmember has the formula NaAlSi3O8.
Albite: A common white feldspar composed of a silicate of alumina and soda. It is a common constituent of granite and of various igneous rocks.
Albite in massive greenish to gray-green to brown in association with black hornblende. Generally, as with most minerals from Philips Mine, the albite is heavily stained with limonite, penetrating the mineral to the extent that identity is obscured.
albite, biotite, calcite, wollastonite, orthoclase, hedenbergite
Locals:
Misc: ...
Albite Rock.- In places the upper edges of the Cambiado strata grade into a granular, grayish rock in which laths of plagioclase feldspar from 1 to 3 mm. in length are thickly set in a greenish-black ground.
ALBITE - Reilly Quarry, Houston, Renfrew.
Intergrown, reddish crystals forming a group to c.2mms.
STRONTIANITE - Muirshiel Mine, Renfrew.
Groups of tabular, hexagonal crystals to c 1mm,
stacked to form botryoidal aggregates.
30-50% albite
Spectrolite, moonstone, sunstone, colorless, yellow, red, green
Bytownite ...
Amazonite in Albite Specimen. Photo: Rob Lavinsky, iRocks.com
Amazonite, a variety of the microcline series of the feldspar group, gets its name from the Amazon River.
The other minerals in jadeite jade from Burma are sodic amphibole (compositions vary between eckermannite, glaucophane, richterite, and edenite), albite, analcime, tremolite, (ilmeno-) rutile, clinochlore, banalsite, and chromite (see, e.g.
All along the sides and bottom of the pocket were matrix specimens of Tourmaline, Albite, Lepidolite, and Quartz.
Moonstone (orthoclase) is a semi-translucent stone that is made of albite and orthoclase feldspar. It is usually whitish-blue, but can be colorless, yellow, orange, gray, or even reddish. Moonstone is usually set as a cabochon.
Moonstone is the most valuable form of feldspar and is composed of albite, which gives it the bluish scheen, and orthoclase feldspar.
Orthoclase feldspar and albite are present in close association, arranged in layers. This causes an interference effect of light. The colour of this schiller regarded as most desirable is blue, which usually occurs in a white or grey body colour.
Moonstone is a variety of albite feldspar and occur colorless, white, blue-white,and pale shades of peach and apricot.
Each member of the group is defined by its albite and anorthite content. Albite and Anorthite are the end members of the series with the middle members being Oligoclase, Andesine, Labradorite and Bytownite.
Moonstone is opalescent, with a blue or white scheen, sometimes called "schiller", resembling moonshine. Composed of albite and orthoclase feldspar, the albite gives it the bluish color.
5020 - Tourmaline on Albite Feldspar - $125.00
Himalaya Mine, Mesa Grande, San Diego Co., California
MINIATURE, 5.0 x 3.0 x 2.5 cm ...
Other names/forms:
Anothite (Ca), Albite (Na)
Most distinguishing features:
Parallel striations and white-gray colour separates this mineral from orthoclase (Kspar).
2) Chivor - Emerald in quartz-albite-apatite veins that invade a gray calcareous shale.
sometimes with copper or hematite inclusions and traces of iron; 32% Albite, 68% Anorthite
Luster: Vitreous
Hardness: 6 - 6.5 ...
It is always found as a compound with other elements in nature, such as common salt, albite, etc.
Morganite is typically associated with quartz, albite and muscovite, and can occur with other pegmatite accessory minerals such as garnet, spodumene, columbite-tantalite, lepidolite, amblygonite, tourmaline, petalite, ...
--A garnet deposit is located near North Wilmont in Merrimack County, where small alrnandite crystals are found in a biotite, quartz, and albite feldspar matrix.
These include quartz (SiO2), the minerals of the feldspar group (orthoclase, K(AlSi3O8), albite Na(AlSi3O8), and anorthite (Ca(Al2Si2O8)) and muscovite mica (KAl2(AlSi3O10)(OH)2).
This precious gem is a form of Oligoclase feldspar which is itself a variety of plagioclase feldspar. The Sunstone gem displays different kinds of colors due to inclusions. The plagioclase feldspar is a combination of albite (sodium aluminium ...
" The "play of light" created by adularescence is caused by thin, alternating layers of feldspar orthoclase and albite.
They are marked by the large presence inclusions like calcite, yellow-brown needles of the mineral parasites, pyrite, albite and biotype inclusions. However good emerald with both high clarity and good colour are extremely rare.
Recently high quality crystals were obtained from Pike's Peak, Colorado. It was found associated with the quartz, orthoclase, and albite. Few other locations in the US yield amazonite. It is also found in pegmatite in Madagascar.
The schiller is caused by a feature of the stone's crystal structure. Orthoclase feldspar and albite are present in close association, arranged in layers. This causes an interference effect of light.
Colombia is also famous for the Trapiche, a rare type of emerald that resembles a star, and has been found in the Muzo, Peña Blanca, Chivor and Cosquez mines. In the Trapiche emerald, inclusions of albite and quartz, among others, ...
This is caused by the reflection of light from the internal structure, made up of alternating layers of albite and orthoclase feldspar.
 See also: Mineral, Crystal, Stone, Color, Crystals
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