wholesale gemstone beads for jewelry making arkansas How about the hardness of the general gold
4 thoughts on “wholesale gemstone beads for jewelry making arkansas The hardness of the thousands of gold”
Leave a Comment
You must be logged in to post a comment.
wholesale jewelry supply companies Generally, the hardness of the thousands of gold is Mo's hardness 2.5, which is similar to human nails.
Thousand -footed gold has the characteristics of good ductility and small hardness. Pure gold is folded and soft, and the bronze strips are laborious. Or use large head needles (nails are also fine). If the force is not large and the traces are obviously golden, the copper is slightly stronger and the traces are slightly worse. It is only difficult for gold bars, gold coins, bricks, and the like.
It pure gold and low hardness. Use nails to draw light marks. The teeth can leave the dental marks. The high -quality gold jewelry is lower than the soft color. Test hardness, pure gold is soft, easy to bend, the lower the purity, the less likely to bend.
The expansion information
Thousand foot gold has its unique golden yellow luster (exception exception). Pure gold will flash dazzling light under strong light. Having.
The thousand -footed gold with a high color, no rhyme and elasticity when the sound is thrown in the ground, and the sound quality of the low -footed gold is slightly brighter, and when the copper product is thrown on the ground, the sound is loud. Therefore, according to the sound of the knocks, we can help us distinguish between common metals and gold.
In December 2014, the National Tiber Commission amended the standard and naming requirements for the purity of precious metals in the national standards of the standard number of the standard number of GB11887-2012. The standard will publicly solicit opinions on the official website of the National Standard Committee from the 23rd, and will be officially approved to be released before the Spring Festival.
If in the international approach, the new standards will cancel the purity name of "Thousands of Gold", "Thousands of Foot Platinum", "Thousands of Foot", and "Thousands of Foot Silver".
2015 Spring Festival, the National Standardization Management Committee announced GB11887-2012 "Regulations on the Pureth of Purple Metals and Names" No. 1 modification form, and will be implemented on May 4, 2016. It can only be marked as "foot gold", not like "thousands of gold".
Reference information Source: Baidu 100-Ford-Thousand Foot Gold
dropship wholesale jewelry The hardness of thousands of gold is Mo's hardness 2.5, which is similar to human nails.
Is when using a metal needle (such as a big head) to leave the real gold, leaving obvious scratches. Folk goldrs often bite with their teeth. According to whether they can bite, the color of the color is also used to argue with the principle of hardness.
metal gold (AU), the higher the purity, the softer the hardness.
Thousand -footed gold and other physical characteristics:
Gelish: red yellow, with a color of more than 95%; positive yellow, the color is about 80%; About 50%.
Densive: 19.32g/cm3
Crystal structure: Facial cube structure
Atomic measuring: 196.96654
The shell structure: 2,8,18,32,18,1 r
Electronic Row: [XE] 4F14 5D10 6S1
Calculation: 1,3
Melting point: 1064.43 ℃
boiling point: 2808 ℃
Electricity: 2.54
Total Price radius: 1.34a
ionic radius: 0.85 ( 3) A
Atomic radius: 1.79a
Atom volume: 10.2cc/mol
The second -level ionization potential: 20.521V
The oxidation state: (3), density at 1
293K: 19.32g/cc
ratio of heat capacity: 0.128j/gk
Small chemical fever: 334.4kj/mol
melting heat: 12.55kj/mol
Catch rate: 0.452x10^6/cm · ω
: 78.3 X10E3 MPA
The thermal expansion coefficient: 14.2x10^(-6)/k
Cilee parameters: 4.0786a
wholesale victorian jewelry Although gold is strong, but not very hard (Mobi Hardness 2.5)
diamond-hardness is 10 (the highest in nature, generally as a relative standard); 9.1;
The yellow jade, tooth enamel-hardness is about 8;
bronze-hardness is about 5.1;
O n-raw iron (FE)-hardness is about 4.5
18k gold- The hardness is 4.0 ~ 4.5 (what the remaining 25%is the metal component);
gold (foot gold)-hardness is 3.7;
n-lead (PB)-The hardness is about 1.5 (the lead is softer than the fingernails);
sodium (NA) -the hardness is about 0.4 (maybe the metal with less hardness in nature)
sonora jewelry wholesale Thousands of gold: The amount of gold (AU) is equal to or more than 99.9%of gold. The mark is thousands of gold and 999 gold. Thousands of gold have its unique golden yellow luster (exceptional exception). Pure gold will flash dazzling light under strong light. This is not available in other metals, including copper inside.
Thousands of gold density: 19.32g/cm3, hardness: Mo's hardness 2.5, which is similar to human nails.
The folk goldrs often bite with their teeth. Based on whether they can bite, the color of the color also uses the principle of hardness to divide the authenticity of gold.