Labradorite Pebble, Madagascar Self Awareness

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Labradorite Pebble, Madagascar Self Awareness Prehistoric Online
Labradorite Pebble, Madagascar Self Awareness Prehistoric Online
Labradorite Pebble, Madagascar Self Awareness Prehistoric Online
Labradorite Pebble, Madagascar Self Awareness Prehistoric Online

Labradorite Pebble, Madagascar Self Awareness

Madagascar

Self Awareness

Approx 1 inch

$5.29

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SKU: or-labpebble

Availability: In stock (can be backordered)

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Labradorite Pebble, Madagascar Self Awareness

Labradorite- ((Ca, Na)(Al, Si)4O8), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. It has an anorthite percentage (%An) of between 50 and 70. The specific gravity ranges from 2.68 to 2.72. The streak is white, like most silicates. The refractive index ranges from 1.559 to 1.573. 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.

Labradorite can display an iridescent optical effect (or schiller) known as labradorescence.

Labradorization is the peculiar reflection of the light from submicroscopical planes orientated in one direction (rarely in two directions); these planes have never such a position that they can be expressed by simple indices, and they are not directly visible under the microscope.

Weight 3 oz
Dimensions 5 × 4 × 1 in
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