Silver is a beautiful mineral and native element. It is known as one of the precious metals, and its history dates back to ancient civilizations, where it was used in many of the ways that it still is today. Sometimes, silver is mined as native silver, but most of the time, it comes from sulfide ores.
Of all sedimentary minerals, calcite is probably the most widespread, contributing a full 2 % to the volume of the Earths crust. It occurs in endless crystal forms with many different colors. With such variety it is not surprising that some collectors specialize on calcite alone.
Agate is a beautiful and very popular gemstone that is widely recognized for its unique and varied colors and banding. It is a type of microcrystalline quartz that is commonly used as an affordable alternative to pricey gemstones in jewelry. It may also be carved into figures or statues, or used in handles for knives.