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certificate jewelry, Turquoise

Turquoise

turquoise is an opaque, blue-to-green mineral that is a hydrated phosphate of copper and aluminum. turquoise has a lower-than-ideal hardness and durability for use in certain types of jewelry.

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, Lapis Lazuli

Lapis Lazuli

lapis lazuli, or lapis for short, is a deep-blue metamorphic stone used as a semi-precious stone that has been prized since antiquity for its intense color.