What does it mean to write SL10042CT75O on the diamond ring of Zhou Shengsheng

Do042CT PT950HHL D0042CT refers to the diamond part, that is, the weight of the diamond, 0.042 carats, 4.2 points, 1 carat = 100 points = 0.2 grams. Generally, diamonds below 20 points are not preserved, with decorative significance. 4 points of small broken diamonds are low in value, 50 ~ 100. The PT950 indicates that the precious metal material of the ring holding part is now the price of the PT950 market at about 490. The landlord does not provide the rings weight. There is no way to accurately estimate. Small diamonds, the ring should not be very large. Considering the factors of platinum proportion, the ring is based on 2 grams, then the value is worth 1,000. If the two add up, the price of the diamond ring should not exceed 1500. Essence Essence HHL may be the mark of the manufacturer or merchant, or it may be a number. Essence Essence If the host sells the ring, this drill is basically worthless, mainly the platinum part, the price of platinum recovery is more than 300 grams.