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Process of Casting silver Jewellery
A two-step process, investment casting, produces small, complex shapes. Most castings, especially large ones, are made in sand molds. Permanent metal molds are used to make many small, simple parts; shell molding gives greater accuracy for a large volume of semi precision parts.Molten silver is poured into the cavity and allowed to solidify. Sand, mixed with a binder to hold it together, is pressed around a wooden pattern that leaves a cavity in the sand. Wax or plastic replicas of the parts are molded in accurate metal molds. Top of the line casting equipments are utilized to produce the silver jewellery. When the whole mold is heated, the replica melts, leaving behind a cavity into which silver is poured.
Diamonds are the hardest of precious stones
The word 'diamond' itself is a derivative of the Greek word adamas, which means 'unconquerable'. The diamonds rarity and natural beauty have contributed to making it such an extraordinary and magical gift. Diamonds are the hardest of precious stones. Many people are confused as to how a diamond is priced. It is the undiminished beauty of diamonds.This does not mean that a diamond cannot be damaged only that they are difficult to damage requiring a very precise strike in an exact location in order to damage the surface. And that has made them so highly prized throughout several centuries. Diamonds continue to hold a deep fascination. As the diamonds is world’s ultimate symbol of love.
All gemstones have some characteristics
Many gemstones are used in even the most expensive jewellery depending on the brand name of the designer, fashion trends, market supply, treatments etc. Others are too common and are given a semi-precious status. Most gemstones have good hardness and a high index of refraction.All gemstones have some characteristics falling short of perfection though; even the seemingly perfect Diamond has four directions of cleavage. Since quartz is everywhere especially in common dirt and dust. Any material that is softer may be scratched during ordinary wear. Nevertheless, diamonds, rubies, sapphires and emeralds still have a reputation that exceeds those of other gemstones.
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