Amethyst 14K gold ring
Trigonal system, the crystal is hexagonal columnar, cylindrical with transverse grain, left shape and right shape, twin-crystal is common. Hardness 7. The crystals often contain irregular or feathered gas-liquid two-phase inclusions. Because part of Si4+ in the lattice is replaced by Fe3+, and under the influence of irradiation, the [FeO4] color center is formed, causing the crystal to appear purple [2]. It is transparent and has obvious polychromatic property when viewed under dichroic mirror.
原价为:$1,400.00。$700.00当前价格为:$700.00。
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