Synthetic moissanite have a dispersion of 0.104 greater than that of diamonds (0.044) and a refractive index of 2.65-2.69 (diamonds 2.42). They have the same diamond luster as diamonds, and have a stronger “fire color” and are closer to diamonds than any previous imitations. The internal structure, value, and appearance of Moissanite diamonds are surprisingly similar to diamonds. Even if they are tested with a diamond pen, they will be judged as diamonds, which is difficult to distinguish. But Moissanite diamonds can shine brighter than diamonds, and their fire colors are even more stunning. At the same time, the price is only 1/10 of diamonds. At the same time, Moissanite has a Mohs hardness of 9.25, which is only lower than diamond 10, which is higher than other gemstones. The high hardness makes it difficult to be scratched and cracked and can be preserved forever.
Synthetic corundum is a gemstone formed from the crystals of alumina (Al2O3). Corundum mixed with metallic chromium is bright red and is generally called ruby; while blue or colorless corundum is generally classified as sapphire. The color of corundum is very rich, including almost all the colors of red, orange, yellow, green, cyan, blue, and purple in the visible spectrum. Pure corundum is colorless and shows different colors when it contains different trace elements. The hardness of corundum is second only to diamond, with high hardness, good wear resistance, high strength, high temperature resistance, corrosion resistance, and high strength.
Synthetic cubic zirconia is one of the oldest minerals formed on the earth. It is called “hyacinthite” in Japan. It is the birthstone of December and symbolizes success. Zircon is the name of the mineral, formerly known as zircon, hyacinth stone, transparent as gemstone, called zircon gem. There are many kinds of zircons, and different zircons have different colors, such as black, white, orange, brown, green, or colorless and transparent. The cut gem-quality zircon resembles a diamond. Zircon is a natural gemstone with a refractive index second only to diamonds and a high dispersion value. The colorless and transparent zircon resembles diamonds and is a good substitute for diamonds.
Spinel is a kind of gemstone with a long history. Its name comes from two sources: one is derived from the Greek word “spark”, which describes its red and fiery color; the other is derived from Latin Spina and Spinells , That is, tip and thorns, because its crystal shape is cubic crystal with a sharp angle, so it is named after it. It means a crystal with sharp corners. It is an oxide of magnesium and aluminum, so spinel is related to corundum. Spinel has a variety of colors, including red, pink, fuchsia, colorless, blue, and green. Glass luster, transparent. Conchoidal fracture.