China wholesale Spinel Rough - Natural Red Spinel Loose Gems Round Cut 0.7mm – Datianshanbian

Product Detail:

Spinel is a mineral composed of magnesium and aluminum oxide, because it contains magnesium, iron, zinc, manganese and other elements, they can be divided into many kinds, such as aluminum spinel, iron spinel, zinc spinel, manganese spinel, chrome spinel and so on.

Spinel has been a precious stone since ancient times. Because of its beauty and rarity, it is also one of the most fascinating gems in the world. Because of its beautiful color, it has been mistaken for ruby since ancient times.

Selection of spinel:

1.The quality evaluation of spinel is mainly carried out from the aspects of color, transparency, clarity, cutting and size, among which color is the most important. The color is best with deep red, followed by amaranth, orange red, light red and blue, asking for pure color, bright-coloured. The more transparency, the fewer defects, the better quality. The best color of spinel is deep red, followed by purple, orange, light red and blue. It requires pure and bright color.

2.The transparency of spinel affects the color and luster, and is affected by the clarity, the clarity of spinel is generally better with less inclusion. The transparency of spinel can be affected by large inclusions or strong deformation of crystal structure. The higher the transparency, the better the quality. Most spinels are relatively clean, and if the spinel is defective, the price is lower.

3.Spinel cutting is also a factor affecting its price. High quality spinel often appear in faceted cutting, and the requirements of cutting and grinding proportion is correct, emerald cutting is the best. Spinel in the cutting, do not have to consider the direction too much, as far as possible to cut the larger the better, and the need for fine polishing. For the size, more than 10CT above the spinel is less, therefore, the price per carat is higher than the general spinel.