Chrysocolla with Tourmaline (500 gram bag from Finland)

Chrysocolla with Tourmaline (500 gram bag from Finland) "made in Germany"

Peridot (Olivine) (bag 500 grams) Norway rare!

Peridot (Olivine) (bag 500 grams) Norway rare! "made in Germany"

Green Opal (500 gram bag) from Kosovo (rare) "made in Germany"

At first glance it looks a bit like Chrysoprase, but breakage and color are different. Rare tumbled stones cut in Germany! And especially rare stones at very low prices!
Availability: In stock
SKU
10770
  • Buy 3 for €125.00 each and save 14%
Green Opal (500 gram bag) from Kosovo (rare) "made in Germany" is available to buy in increments of 1

The mineraloid opal is an amorphous variety of quartz, SiO2nH2O, hydrated silica with a water content of up to 20%. Opal can be colorless, white, milky blue, gray, red, yellow, green, brown and black. Often many of these colors can be seen immediately, caused by interference and diffraction of light passing through minute, regularly arranged openings within the microstructure of the opal, known as Bragg's lattice. These openings are filled with secondary silica and form thin lamellae within the opal during hardening. The term opalescence is used to describe this unique and beautiful phenomenon, although play of colors would be a better term. Opal is one of the minerals that form or replace fossils. The resulting fossils are saved by collectors. "Opal" is derived from the Old Indian word úpala, which means gemstone. A distinction is made between the glittering precious opals, the yellow-red fire opals and the ordinary opals. Their physical properties show important differences. The opal is the official gemstone of South Australia. Opal has been worked as a gemstone since ancient times. Initially it was used for the manufacture of primitive tools, later for ornamental objects. Opal was already used by the Assyrians, Babylonians and Romans. Noble opal is one of the most mysterious stones. Traditionally, it was considered a bad luck stone, especially for people who did not clean it properly. The precious opal that Pliny described comes from the Dubník deposits in Slovakia, which were already being mined at that time. Magical powers were attributed to this stone. It helped against melancholy, calmed the nerves, healed the heart, protected from worry, restored vision and gave the eyes a new glow. In addition to naturally occurring opal, opal is manufactured in many different ways, experimentally and commercially. The resulting material is distinguishable from natural opal by its regularity; under magnification patches of color are seen to be arranged in a "lizard skin" or "chicken wire" pattern. Synthetic opals are further distinguished from natural opals by the lack of phosphorescence of the former under UV light. Also, synthetic opals are generally lower in density and are often highly porous; some can even stick to the tongue. Two notable producers of synthetic opal are the Kyocera and Inamori companies in Japan. Most so-called synthetic opals, however, are more correctly called imitations, as they contain substances not found in natural opals (e.g., plastic stabilizers). The Gilson opals often seen in vintage jewelery are actually imitations consisting of laminated glass with bits of foil sprinkled.

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Dimensions 20-35mm
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