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wholesale custom necklaces What are the requirements for the quality of garnet?

Posté le par Joyjy

The English name of garnet means “like a seed”, which means it is very similar to the “graine” in pomegranate. Often referred to as “grenat” for short. The technical name of the garnet gemstone in my country is “Ziyawu”.

Garnet is a big family, which can be divided into two series and six varieties. Namely: ①Aluminum series garnets, including magnesia garnet, almandine, and spessartine; ②Calcium series garnets, including garnets, grenats, and garnets. The density of garnet is 3.5-4.3g/cm3; it has high hardness (6.5-7.5), high refractive index (1.74～1.89), strong luster and beautiful color. It is a gem variety that modern people love . The most common gems that can be used are magnesia and almandine.

The economic value of garnet varies depending on the color, transparency and particle size. The main factor is the color. Parmi eux, emerald green garnet and chromium vanadium-containing garnet have the highest value. The price of transparent and flawless is equivalent to emeralds, but they are rare. Followed by the red spessartine and orange spessartine are popular. If it has a brown tint, the value will decrease. Translucent garnets are mostly used as jade materials and have low value.

The general requirements for gem-grade garnets are strong and uniform color, lustre fort, transparence élevée, et pas de fissures et d'autres défauts. But for different color varieties, the specific requirements are different. For red varieties, the best color is required to be blood red, followed by pure red, light red, strong red, and purple; for green varieties, the color is required to be emerald, followed by green, light green, and yellow-green. The particle size of garnet should be greater than 3mm, especially high-quality ones can be slightly smaller.

 

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