(1) Look at the color: The higher the purity of gold jewelry, the darker the color. In the absence of a gold medal, the general fineness can be determined according to the following colors (based on cyan gold). The so-called green gold is just silver in gold); The fineness of deep red yellow is above 95%, light red yellow is 90-95%, light yellow is 80-85%, blue yellow is 65-70%, blue white is only 50-60%, and yellow white is less than 50%. The so-called seven greens, eight yellows and nine reds can be used for reference. (2) Balance weight: The specific gravity of gold is 19.32, which is heavier than silver, copper, lead, zinc, aluminum and other metals. Because the volume of gold is more than 40% heavier than that of silver, 1.2 times heavier than that of copper and 6. 1 times heavier than that of aluminum. Gold jewelry should feel heavy in your hand, while fake gold jewelry feels light and floating. This method is not suitable for gold ornaments with precious stones.
(3) Look at hardness: Pure gold is soft and low in hardness, and shallow marks can be drawn with nails, and tooth marks can be left after biting. Gold ornaments with high color are softer than those with low color, and the more copper they contain, the harder they are. Bending method can also be used to test hardness. Pure gold is soft and easy to bend, and the lower the purity, the more difficult it is to bend.
(4) Listen to the sound: When real gold with a purity of over 99% is thrown on the hard ground, it will beep, without rhythm and elasticity. Fake or low-quality gold sounds crisp and dull, generally making a "Dangdang" sound, with a lingering sound, and violently beating after landing.
(5) Burning with fire: Burn the jewelry to be identified with fire (do not melt and deform the jewelry), and observe the color change after cooling. If the surface is still golden, it is pure gold; If the color darkens or turns black to varying degrees, it is not pure gold. Generally, the lower the fineness, the thicker the color, and all of them turn black, indicating that they are fake gold ornaments.
(6) Look at the mark: domestic gold ornaments are purified and prepared according to international standards, and marked with marks, such as "24K" for "full red" or "pure gold"; 18K gold, marked with the words "18K". If the color is lower than Locke, the K-gold seal number cannot be printed according to regulations. Nowadays, criminals in the society often make fake brands and imitate stamps, and use rare gold, inferior gold and even brass as real gold. Therefore, the identification of gold ornaments should be based on the comprehensive judgment of samples to determine the authenticity and color.
The difference between palladium and platinum
First, quality.
1. Pure high-purity platinum jewelry, platinum jewelry engraved with the Pt950 logo, indicating that the purity is 95%; The purity of products engraved with Pt900 logo is 90%.
2. The annual output of rare platinum is very limited. A ton of ore has to go through more than 150 processes to get a few grams of platinum.
3. Solid platinum has a high density and is not easy to be damaged even by friction, so the jewelry made of platinum is very fine. All kinds of precious stones inlaid in platinum are not easy to fall off.
4. The natural white metallic luster of platinum is natural, elegant and subtle;
5. Platinum jewelry is easy to match with all kinds of clothes, and can always create fashion classics.
Second, the difference
I think the difference you ask is the difference between platinum and k gold, because there are two kinds of white precious metals popular in the market now, namely platinum and k gold. It is difficult to identify with naked eyes. The difference method: white gold, commonly known as platinum, is an alloy. Usually marked with "18K" or "750". Platinum is a natural white precious metal, and its content is marked with PT900 or PT950, so you should recognize the mark when buying it. It is best to buy from a reputable merchant! This is very important! ! !
Third, it is the market price now.
Pt950, 260-300 or so, (depending on your city) men's platinum rings are relatively large.
Fourth, the significance of sufficient platinum
That is, platinum ornaments marked with pt950 or pt900 are called foot platinum ornaments.
The meaning of verb (verb's abbreviation) K gold
Due to the addition of different metal elements, K gold can appear in many colors such as yellow, white, red and green. No matter what color of K gold, its gold content is 75%, marked with "18K" or "750". White 18K gold is essentially different from platinum. Whether it is texture or value.
Six, platinum and palladium (special tips)
Platinum logo:pt；; Palladium standard: pd. In terms of price, palladium is much cheaper than platinum; From the texture point of view, palladium is light and brittle, and its color will darken after wearing for a period of time, while platinum will never have the above problems.
Are you satisfied with the above answers? I've been looking for it for a long time. Should I add points? Haha, just kidding!