Agate is one of the birthstones for this month and unlike most birthstones it comes in a wide variety of colours which got us thinking that we should find out a bit more about this popular and varied gemstone.
According to Geology.com an agate is “a translucent variety of microcrystalline quartz. It is used as a semi-precious stone when it is of desirable quality and color. Agate generally forms by the deposition of silica from ground water in the cavities of igneous rocks. The agate deposits in concentric layers around the walls of the cavity or in horizontal layers building up from the bottom of the cavity. These structures produce the banded patterns that are characteristic of many agates.
“Agate occurs in a wide range of colors which include: brown, white, red, gray, pink, black and yellow. The colors are caused by impurities and occur as alternating bands within the agate. The different colors were produced as ground waters of different compositions seeped into the cavity. This banding gives many agates the interesting colors and patterns that make it a popular gemstone.”
With so much to choose from we took a look at some the types of agate that stand out from the crowd.
Binghamite or silkstone
Mexican crazy lace agate
And finally some spectacular agate jewellery.
We love this cuff with slabs of agate. Unfortunately we can’t track down who originally made it from the Pinterest link – we’d love to know.
We hope you enjoy exploring the world of agates – and please do share your pictures with us of any agate jewellery you have, via twitter @jewelleryschool