PT is the abbreviation of platinum, also known as pure white gold, positive platinum or true platinum. Pure platinum is relatively soft, and the addition of metals such as ruthenium, rhodium and palladium will increase its hardness. PD stands for palladium, and gold is a member of the platinum group. It is silvery white, lighter than platinum and slightly harder than platinum. In terms of price, palladium is much cheaper than platinum; In terms of texture, palladium is light and brittle, while palladium jewelry is easy to fade, deform and wear after being used for a period of time because of its strong chemical properties of absorbing gas. Based on the above characteristics, the color of palladium jewelry will darken after wearing for a period of time. ? There are two kinds of platinum, one is palladium and the other is platinum. The price of palladium is generally 180 yuan/g, marked PD; Platinum is more expensive, generally in 280 yuan/gram, marked with PT; Platinum and palladium are both platinum, so it is difficult to distinguish colors, only by the logo letters indicated on the receipts or invoices issued by the sales staff.

Palladium: It is mainly smelted from natural cymbal. Its color is silvery white, its appearance is similar to platinum, it has metallic luster, its hardness is 4-4.5, its relative density is 12, its melting point is 1555 degrees, its chemical properties are stable, its value is low, and it is rarely used to make jewelry.

Platinum: refined from natural platinum and crude platinum ore. Because "platinum" is composed of "gold" and "white" and its color is silvery white, it is also called "platinum". Its color is silvery white, metallic luster, hardness is 4-4.5, relative density is 2 1.45 and melting point is 10.

Platinum: Platinum is chemically more stable than gold and its price is higher than that of Huang Jingui. Used to make high-end jewelry. The "Pt900" or "Pt950" seen on jewelry products represent that the platinum content in jewelry is 90% and 95% respectively.

pure

The purity of platinum jewelry is generally 95%, while the purity of 18k gold is only 75%. No metal can be completely pure, and there are impurities mixed with other metals. Platinum has almost no impurities, and its purity is extremely high. It will not fade and change color, and it can still maintain its luster over time. The pure white luster of platinum can well reflect the true light of diamonds.

infrequent

Platinum is 35 times rarer than gold. In the world, it can only be mined in a few places, mainly South Africa and Russia, as well as a few areas in Zimbabwe, Canada and South America. Only 88 tons of platinum is made into ornaments every year, while 2700 tons of gold. The quantity of platinum ore is less, and the ratio of platinum ore to gold ore is 1 to 10.

eternal

The density and weight of platinum make it more durable than other jewelry metals. All precious metals leave scratches, including platinum. However, the scratches on platinum only move the metal and will not reduce its volume, while the scratches on gold will bring wear and reduce the volume of gold. If visible scratches appear on platinum, qualified jewelers can polish it again.