Oligoclase is common in granite, syenite, diorite and gneiss. It is a frequent associate of orthoclase.
Oligoclase: (Also called Plagioclase) A triclinic feldspar made of soda-lime.
Olivelia Shells: A kind of seashell used for Heishi necklaces.
Olivine: See Chrysolite and Peridot.
Oligoclase occurs as massive specimens and is a common mineral in the surrounding country rock.
Oligoclase-microcline with black tourmaline and beryl.
Albitized microcline with more frequent black tourmaline and beryl.
SUN123, Oligoclase, Sunstone, [N], 6.0mm Round Brilliant Cut, 1.25 ctw. $ 89.99 pair
SUN102, Oligoclase, Sunstone, [N], 9.9x5.3mm Emerald Cut, 1.51 ct. $ 139.99
SUN143, Oligoclase, Sunstone, [N], 12.0mm Cabochon, Round Cut, 9.20 ct. $ 114.99 ...
see labradorite, oligoclase
sodium calcium alum. silicate
Color: colorless, white, yellowish, green, pink, to reddish
SG: 2.62 - 2.76
Comments: can be found in triclinic crystals or in massive form
Anorthosite ... intrusive igneous rock ...
Aventurine FeldsparAventurine feldspar is also called Sunstone (a variety of oligoclase). This gemstone varies from golden to orange to red-brown, and can be transparent or translucent.
Plagioclase: Another name for Oligoclase.
Platinum: One of the three "precious metals" along with gold and silver, platinum is the rarest of them all.
Only two species of gemstones are commonly seen in aventurescent form: quartz and oligoclase feldspar.
Another name for Oligoclase.
Plating
Plating or electroplating (also called Galvanotechnics after its inventor, Luigi Galvani) is a process in which one metal is coated with another metal using electricity.
Aventurine feldspar is also called Sunstone (a variety of oligoclase). This gemstone varies from golden to orange to red-brown, and can be transparent or translucent.
Sunstone is also called aventurine feldspar (a variety of oligoclase). This gemstone varies from golden to orange to red-brown, and can be transparent or translucent.
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.
Sunstone is a species of feldspar called "oligoclase" or known sometimes in the jewelry industry as "adventurine feldspar". In addition, sunstone contains small hematite crystals that give it additional sparkle. The sparkle is known as aventuresence ...
Sunstone is a member of the plagioclase feldspar group of minerals and occurs in the compositional range of oligoclase, labradorite and andesine. Orthoclase sunstones are also known.
(aka "rainbow moonstone") is composed of adularia (alkali feldspar) which is a form of orthoclase (Greek for "straight fracture") that typically crystallizes at lower temperatures due to hydrothermal activity; or plagioclase feldspar oligoclase ...
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.
This crystal system should possess either a center operation of symmetry or translational symmetry. Instances of minerals and crystals in triclinic system are babingtonite, inesite, bytownite, kyanite, turquoise, albite, rhodonite, oligoclase and so ...
Moonstone has a hardness of 6 and a specific gravity of 2.57. It is monoclinic; it has one two-fold axis of symmetry. Adularia is a common type of moonstone. Oligoclase is another type of moonstone; Labradorite and albite are rare forms.
The sodium-rich (albite) and the calcium-rich (anothite) form a continuous series of what is known as the "plagioclase" feldspars. The ratios are as follows: Albite (100) - Anorthite( 0) Albite Albite ( 90) - Anorthite( 10) oligoclase Albite ( 70) - ...
 See also: Crystal, Color, Mineral, Stone, Gemstone
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