chrome heart for sale

Peridot is a green with yellow, middle and low gems like olive on the market, the most common counterfeit goods made ​​of colored glass olivine. The main difference is that the olivine has a "double shadow, while the glass is not; often visible crystalline inclusions, glass bubbles containing only olivine; olivine proportion of 3.5, a hardness of 7, than glass specific gravity (2.6) and hardness (6) should be large.
  Natural peridot
Identification of a pearl
Pearl natural pearls and cultured pearls, cultured pearls have water beads and freshwater pearls divided. Natural pearl production less expensive price; cultured pearls can be high-volume output, so the price is much lower. The main difference between the two is not nuclear, natural pearls and cultured pearls within. The natural pearls kernel often just some sand or parasites matter, not even nuclear. The cultured pearls kernel is artificially produced larger beads, the outside is wrapped in a thin layer. The performance on the body surface, natural pearl its growth environment is random, the foreign body rarely rolling the core, its appearance poor roundness. The cultured pearls kernel rounded into beads roundness. Natural pearls grow up in a long time, so after beads fine texture, thick layer of beads, skin smooth, rarely convex bubble, and more transparent. Cultured pearls due into beads sound short, therefore, beads and thin, rough texture, gloss with wax-like, and the surface is often bump "vesicles" poor transparency. If perforated pearls, careful observation of the hole with a magnifying glass, the case of cultured pearls, are generally able to see the beads inside a brown boundaries, which is the dividing line between the nacre into the kernel and later grow out.
Currently, the market often appear imitation pearls, generally based on glass beads coated with of ichthyosis powder or silver made ​​its luster with real pearls are significantly different, not the same weight, and little experience to identify. If nails or small Daogua of, immediately exposed flesh.