Sterling silver is an alloy of 92.5 % silver and 7.5 % other materials - usually copper

Silver is so soft in its pure form, it must be mixed with other metals, such as platinum, nickel and copper, to make it hard and durable enough to make jewellery 

Silver is the metal of the moon.

Natural pearls are really a case of a simple accident of nature and are formed randomly. 

Pearls vary in color from white to those with a hint of color, often pink, to brown or black. 

Displayed in the Louvre in Paris is a fragment of the oldest known pearl which was found in the coffin of a Persian princess who died in 520 BC.

Keeping up with fashion, had a cost, and several small European royal houses bankrupted themselves over their new love for pearls. The cultural associations between pearls and tears inevitably continued.

Amber increases in value with the rarity and perfection of the entrapped object.  Complete insect specimens are rare though and command top price.

Amber can range in color from dark brown to a light almost clear lemon yellow.  Most amber that has been used in jewellery is from the region of the Baltic Sea or the Dominican Republic.

Fine silver is 99.9% or better silver content, but is too soft for general use.

The charm bracelet was thought to have originated in ancient Egypt during the age of the pharaohs. Charms made of precious metals and gemstones would be worn on these bracelets to ward off evil spirits. These were known as Lucky Charms 

As far as we know, the first civilization to utilize ceremonial ring exchange in a wedding was the Romans