cheap mens rings Characteristics of Corals

In the warm sea, a group of coral polyps gather together and climb on the rock. The inner polyps gradually die and calcify to form the skeleton of the coral. Dock, the outer polyps continue to grow and form dendritic corals over time. Polyps are coelenterates on the bottom of the sea, so corals are formed by animals. There are continental shelf areas with a depth of three to three hundred meters. The Pacific and Mediterranean have been the main sources of corals since ancient times. Red corals are the most valuable among corals-there are other pink, white and black corals.

Coral is an organic gemstone formed by animals. The chemical composition is calcium carbonate. It mainly appears in the form of calcite, with a refractive index of 1.486-1.658, a specific gravity of 2.6-2.7, and a hardness of 3-4. It is similar to pearls, and the same as uncut coral. The surface gloss is very poor and can have a glass-like gloss after polishing. Chemical substances such as acids or alkalis can cause great harm to corals and should be avoided as much as possible. It is best not to come into direct contact with human sweat, perfume or cosmetics when wearing them; wipe it clean with a clean soft cloth after wearing to avoid corrosion caused by residual sweat , Can extend the life of corals.

Coral imitations are mostly artificial products with many materials, such as glass, silica gel, gypsum, rubber, etc., mixed to imitate corals, but such artificial products are generally very uniform in color and cannot imitate the natural growth structure of corals. , An experienced person can recognize the difference between imitations and natural corals with the naked eye.

Corals that are made into jewellery can be inlaid or independently formed. If it is inlaid with other precious metals, consider the characteristics of precious metals during maintenance. Till exempel, silver will oxidize and turn black, and pure gold will turn white. For the independent formation, the characteristics of the coral itself are mainly considered.

 

OEM/ODM smycken Tillverkare Design Anpassad dina egna smycken

Låt oss komma igång : mo@kingjy.com

 

Guangzhou Jingying Focus på anpassade grossistringhalsband armband örhängen Sterling Silver 925 smycke,Sterling Silver Gold pläterad med 18K,14K,24K gult guld,Vitt guld och rosguld.,Logotypmärke eller andra ord med lasergravering enligt kundens krav.

Vår månatliga produktionskapacitet är upp till 50,000 bitarmband halsband örhängen ring smycken. Jingying ingår ett partnerskap med stormarknader,smyckekedjebutik,utloppsbutiker,smycken grossist,handlare och smyckemärke,Professionell tillhandahålla skapa anpassade smycken och massproduktion av hög kvalitet 925 Sterling Silver Jewelry Service.

 

OEM/ODM smycken Tillverkare Design Anpassad dina egna smycken

Låt oss komma igång : mo@kingjy.com

 

Guangzhou Jingying Focus på anpassade grossistringhalsband armband örhängen Sterling Silver 925 smycke,Sterling Silver Gold pläterad med 18K,14K,24K gult guld,Vitt guld och rosguld.,Logotypmärke eller andra ord med lasergravering enligt kundens krav.

Vår månatliga produktionskapacitet är upp till 50,000 bitarmband halsband örhängen ring smycken. Jingying ingår ett partnerskap med stormarknader,smyckekedjebutik,utloppsbutiker,smycken grossist,handlare och smyckemärke,Professionell tillhandahålla skapa anpassade smycken och massproduktion av hög kvalitet 925 Sterling Silver Jewelry Service.