certificate jewelry, Salt Stone

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certificate jewelry, Nano Alexandrite
Nano Alexandrite

Alexandrite is known as "Emerald by day, ruby ​​by night" because it has one of the most dramatic color changes among gemstones, such as green in sunlight and red in incandescent light. The very precious habit of alexandrite color change is caused by the presence of minor impurities in the element chromium. The most desirable Alexandrite colors are those that have a very clear color change.

certificate jewelry, Garnet
Garnet

garnets are a category of silicate minerals that have been used since the Bronze Age as gemstones and abrasives. all species of garnets possess similar physical properties and crystal forms, but differ in chemical composition.

certificate jewelry, Opal
Opal

opal is a hydrated amorphous form of silica. because of its amorphous character, it is classed as a mineraloid, unlike crystalline forms of silica, which are classify as minerals.