Something on gems, jewels and jewelry store
The characteristic of a stone the perfect gem is to be beautiful, hard and of course scarce. One of the more known and cherished is the diamond, to the one that he is regarded as the most precious stone. However, the not so valuable gems for his hardness exist, but yes for for what's beautiful that they are ; Pearls are an example of this, the turquoise gets damaged if you enter in touch with water or the grease, in general the soft stones are easily scratched by sand and they dim in the atmosphere.
In order to be valuable, stones must be on short supply. Them common, although beautiful, they do not have great value. However, not all gems are mineral or stones. The pearl is an obvious example of this, the oyster is produced by a so-called mollusk; For his part amber, frequently used like a gem, you are made of the fossilized sap of the prehistoric trees. The coral, you consider also a gem, and he is formed for tiny so-called animals polyps.
The majority of the stones and precious minerals used for gems form themselves naturally in the terrestrial surface. Many million years ago, the rocks that form the terrestrial surface were fused and when they got cold in gradual form and they became solid, the mineral contentses in them took shape like crystals that are in the long run the origin of the gems.
A thing more than seemed curious to me the variety comes from materials that have been used at jewelry store for the different cultures. For example hide, bone, wood have been used. Shells, beetles and draught iron. Initially the jewelry store was worked up with the objects that were further by hand and the fact that you narrate his ancient possessors' life to us is like an open book.