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Can be true gems with diamonds-cassiterite Portugal custom bracelets gold

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The main component of cassiterite is tin oxide, which is an oxide mineral, often containing trace elements such as iron, niobium, tantalum, titanium and manganese. Cassiterite is a tetragonal crystal system. The crystals are often short columnar, slender columnar or double cone-shaped, and the conical aggregates are block, granular or kidney-shaped; with diamond luster to semi-diamond luster, transparent to translucent, hardness 6.0 ~ 7.0; pure ones are white or colorless, but because they contain a variety of trace metal elements, they also have a variety of colors, generally brown, yellow and reddish brown, black when iron content is high, and pitch with high niobium and tantalum content black. Cassiterite also has the characteristics of high specific gravity, high hardness, strong dispersion (higher than diamond), incomplete cleavage, no characteristic inclusions, acid resistance and other characteristics, so those with high quality enter the ranks of gems.

The sparkle and dispersion of pure and transparent cassiterite crystals are quite charming. It is a very charming gemstone. Only this high-quality cassiterite body can be processed and polished into a standard round diamond facet stone, and it can be used as a substitute for diamonds. Instead of colored diamonds, it is also easy to be confused with diamonds, brown zircon and sphene, but because cassiterite has a higher specific gravity and significant dichroism, it is not difficult to distinguish from the above-mentioned similar gems. It’s just that this kind of high-quality gem-grade cassiterite and its inlays are rarely seen and the price is quite high. Apart from a small amount of cassiterite used to make gems and ornamental stones or collections, it is mainly used in industry. The tin content of cassiterite is as high as 78%, and it is an important mineral for refining tin, which is more valuable than it as a gem. In industry, tin can be used to make white iron, tin tubes, tin foil, various alloys and electroplating parts, and its oxide can be used to make dyes, enamels, porcelain and glass.

Cassiterite deposits are closely related to acid granite magmatism. 그중, cassiterite quartz veins and cassiterite sulfur deposits are the most valuable, often coexisting with fluorite, quartz, 전기석, and apatite, and are also enriched in placers. The main producing areas of cassiterite in the world are Malaysia, Bolivia, 미국, Germany, 호주, Namibia, Brazil and China. Gem grade cassiterite is mainly produced in Bolivia. Tin ore is one of China’s high-quality minerals. The most famous producing areas are Dachang, Guangxi and Gejiu, Yunnan, but few have reached gem level. ~ 안에 1981, a columnar, light pink brown transparent cassiterite crystal weighing 19.5 carats was found in the placer around the South China Tin Mine, indicating that China also contains this gem resource.

 

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광저우 징징 맞춤형 도매 반지 목걸이에 중점 925 보석류,스털링 실버 골드는 18K로 도금되었습니다,14케이,24K 옐로우 골드,화이트 골드와 로즈 골드.,고객의 요구 사항에 따라 레이저 조각으로 로고 브랜드 또는 기타 단어.

월별 생산 능력은 최대입니다 50,000 조각 팔찌 목걸이 귀걸이 링 보석.,보석 체인점,콘센트 상점,보석 도매기,트레이더 및 보석 브랜드 회사,Professional은 고품질의 맞춤형 보석 및 대량 생산을 제공합니다. 925 스털링 실버 보석 서비스.