About Gemstone - Mineral : What is Chalcedony Crystal

Gemstone mineral Chalcedony crystal quartz

Chalcedony, is basically a quartz in Microcrystalline ( so friggin tiny ) form.

With the Chemical formula SiO2 of Silicone Dioxide

Geode Chalcedony Quartz mineral crystal gemstone
The Picture above is Chalcedony from a Geode. Will write about geode soon :)

Chalcedony come with so many color, some a bit monotone for my taste but some other is sounique and beautiful.

The color are White, blue, red, green, yellow, orange, brown, pink, purple, gray, black, colorless, and multicolored. Often banded in many different color combinations, and a few rarer forms are iridescent

Its Quartz, so the MOH scale is 7, one scale below topaz.

Sapphire is 9

For comparison, steel nail is around 6.5 in hardness.

This is some variety of Chalcedony that you can find :

  • Agate ( so many amazing kind of agate, you should google them )
  • Carnelian ( I love this one )
  • Chrysocolla
  • Chrysoprase
  • Jasper
  • Dallasite
  • Onyx
  • Sardonyx
  • Petrified Wood
  • Tiger's eye
  • Moss Agate

I'll upload some of my Chalcedony Collection :)

Carnelian chalcedony mineral gemstone quartz

More Posts