Gemstone Color The beautiful color of a gemstone is its most defining characteristic, dan banyak pembuat perhiasan menganggapnya sebagai kriteria evaluasi yang paling penting. Saat memutuskan warna batu permata, memeriksa rona, nada, dan saturasi. Hue The most valuable gemstones are those that exhibit a pure color and only "sedikit" hues of other colors in [...]
