.999 fine silver is whiter in appearance than .925 sterling silver and tarnishes less. It does not trigger allergies in people sensitive to nickel or other alloys.
Gem quality druzy is created when a layer of tiny quartz crystals forms over the top of another stone. Natural druzy crystals can be colored themselves or take their color from the underlying stone. The surface of a druzy is sometimes coated with gold or other substances for a dramatic effect. Titanium druzy has been treated with a thin layer of titanium to give it a beautiful color and iridescent sheen.
Moonstone is a variety of orthoclase, a feldspar. It often has a sky blue opalescent sheen, also called schiller or fire, making the stone look as if it is glowing. The sheen is created by thin layering of orthoclase with another mineral, albite. Moonstone was used in jewelry from 100 AD in Rome and even earlier in Asia.