Introduction:

In fact, a kind of blue sapphire called Taiwan Province sapphire produced in the east of Taiwan Province Province is not a sapphire of corundum family. Its main component is silicon dioxide, which is sky blue because it contains a small amount of copper, which is the highest price among the precious stones produced in Taiwan Province Province at present.

Reasons for formation:

Sapphire in Taiwan Province Province is generally produced in the coastal mountainous areas on the east coast, starting from Fengbin Township in Hualien County in the north and reaching Dulan Town in Taitung County in the south, spanning two counties. Formed in Miocene (about 7 million to 26 million years), its origin is between 500m ~ 1600m above sea level, and most of them belong to hydrothermal deposits, because the thermal solution containing supersaturated silica is enriched in fault cracks and andesite breccia at low pressure, and then it precipitates gorgeous colors.

Generally speaking, the original stone is often mixed with malachite, and contains a small amount of chlorite, native copper, iron oxide and water. The color is generally sky-blue to blue-green, and copper is the reason for its color. The proportion of copper is about 0.0 1% ~ 0.02%. The occurrence of gem veins is mostly dovetail structure, and the veins often extend about 10m with a width of about 5 ~ 6544.

Extended data:

Related information:

Blue agate in Taiwan Province Province began to be mined during the Japanese occupation, and now the upper vein is gradually exhausted, and the lower vein is difficult to overcome due to machine and technical problems, and the mining cost is greatly increased. Although several blue agate mining areas are being mined, they are all small in scale. But after the typhoon and rainstorm, there will still be treasure hunters in Qilixi, a mountain stream, hoping to find the treasure in the gravel.

The quality of blue agate produced in coastal mountainous areas is the best in Qilixi area. Blue agate is bright blue or blue-green because it contains a small amount of copper. Often found in the oxidation zone of porphyry copper deposits, produced in the United States or Chile. Blue agate produced in coastal mountainous areas of Taiwan Province Province has the most beautiful color, the best quality and the highest market. Unfortunately, the mine source has gradually dried up.

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