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A choker is a close-fitting necklace worn around the neck, typically 14 inch to 16 inch in length. Chokers can be made of a variety of materials, including velvet, plastic, beads, latex, leather, metal, such as silver, gold, or platinum, etc.
The gold number is the weight in milligrams of a protective colloid which checks the coagulation of 10ml of a given gold sol on adding 1 ml of 10% sodium chloride. Thus smaller the gold number, greater is the protective action. [3] Gold numbers of some materials Gelatin 0.005-0.01 Albumin 0.1 Acacia 0.1-0.2 Sodium oleate 1-5 Tragacanth 2 [4]
Rose gold jewelry is becoming more popular in the 21st century, and is commonly used for wedding rings, bracelets, and other jewelry. Although the names are often used interchangeably, the difference between red, rose, and pink gold is the copper content: the higher the copper content, the stronger the red coloration.
There are three basic techniques that may be used to attach granules to a metal surface: hard soldering, fusing and colloidal soldering. The metals used in granulation are usually gold and/or silver alloys of high purity – alloys below 18 kt. gold and sterling silver being unsuitable. With each technique, the process begins with the making of ...
Example of bead set diamonds Example of pavé set diamonds "Bead setting" is a generic term for setting a stone directly into metal using gravers, also called burins, which are essentially tiny chisels. A hole is drilled directly into the surface of the metal, before a ball burr is used to make a concave depression the size of the stone.
It is a dense substance, with a density between 5.6 and 6.0 g/cm 3 —about 1.65 times that of diamond. Cubic zirconia is relatively hard, 8–8.5 on the Mohs scale—slightly harder than most semi-precious natural gems. [1] Its refractive index is high at 2.15–2.18 (compared to 2.42 for diamonds) and its luster is Adamantine lustre.
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