“Agate” is named after the river Achates in Sicily. Geodes are often Agates that are completely filled.
Agate is a banded chalcedony, which sometimes contains opal. It’s quartz fibers are vertical to the band’s surface and can be of different colors.
It has a hardness of 7.
German Agates are often pink, red or brown. South American ones are dull gray. They receive lively colors through dye.
Agates can be transparent or opaque.
In their natural form, they can range from a fraction of an inch to several yards wide.
There are several speculations as to how an Agate is formed. The most accepted current reason is that liquid drops of silicic acid cool with cooling rock and produce a layered crystallization from the outside.
The most important deposits of these are currently in Brazil, and these stones are often dyed. This art of dying can be attributed to the Romans. Since 2007, however, agates are labeled if they are dyed.
We have several pieces made here from Agate. Some of them are even fused with 18k yellow gold or platinum to give them extra sparkle!