Ofcourse , first & very basic difference is Semi Precious Stones are natural stones, where as Imitations are man-made stones., like American diamonds Semi precious stones as a category is so vast that it comprises almost every other stone apart from Diamond, Ruby, Emerald, Sapphire and Pearls. There are some 130 types of stones, minerals and crystals that can be considered as Semi Precious Stones. These are natural & original gemstones. In Semi Precious .
Sterling silver is an alloy of silver containing 92.5% of silver and 7.5% of other metals, usually copper. Often, sterling silver and silver are described as the same thing, but in reality, sterling silver is only an alloy of silver. Silver, which is usually called fine silver, consists of 99.9% pure silver, is relatively soft, so silver is usually alloyed with copper to increase its hardness and strength. Sterling silver is prone to tarnishing, .