Cookies help us to give you the best experience. Are you ok with that? Agree Settings
Call +31 (0)412-405131
Login

Forgotten your password? Click here.

Register

  • NL
  • EN
  • DE
  • FR

Back from the gemshow in bangkok we bought the rare stone Sultanite ("Diaspore") against very good prices and furthermore 50-80% DISCOUNT on everything in Hall 2, 3 & 4 Lava outdoor images up to 70% off, all horns, shells and ocean drums also 60-70% Discount. Come quickly, very interesting! Raw stones and Madagascar products from as little as 1.50 / kilo.

< Back to overview

Sunstone tumbled stone (25-35 mm) from India

Sunstone tumbled stone (25-35 mm) from India

Product

Sunstone tumbled stone (25-35 mm) from India

Description

Permanently 20-25 tons (20,000-25,000 kg) tumbled stones in stock from reputable polishing companies from South Africa, Brazil and Germany are offered in various sizes and types of stone.

More information

The mineral oligoclave or sunstone is a sodium calcium aluminum tectosilicate of the chemical formula (Na, Ca) (Si, Al) 4O8. It belongs to the field spots. The colorless, greenish, gray or brown oligoclase has a glass gloss, a white dash, a perfect splitting according to crystal plane [001] and a good according to [010]. The average density is 2.65 and the hardness is 7. The crystal system is trichlien and the mineral is neither radioactive nor magnetic. The name of the mineral oligoclasa is derived from the Greek words oligos and klasein, "little splits". Oligoclast is a common field splash in metamorphic and coagulation rocks as pegmatite. It is part of the plagioclaas series (albiet anorthite). The type location of oligoclaas is Twedestrand in Norway. Presumably, the Vikings used oligoclaas as a navigation tool to determine the position of the sun at cloudy weather. This mineral can reveal polarized light that forms circles around the sun due to the refraction in the atmosphere. The crystal doubles the rings. If both are equally visible, the crystal is directed to the sun. The rings are also visible when the sun is already underneath.

 

STRONG TRADEMARKS TIMMERSGEMS GROUP