This red/orange/brown stone has a hardness of 8 and a bright streak.

The closest thing I've ever seen was amber, but amber is way softer than this

What kind of stone is it?

enter image description hereenter image description here

  • I know it don't look like it from the picture but it is transparent – Rickard Oct 10 at 16:04
  • 1
    The picture is so out of focus that damages the eyes – Universal_learner Oct 10 at 16:18
  • my camera on my phone sucks but there's another picture Lil bit better – Rickard Oct 10 at 16:25
  • 2
    replace both pictures for a good one with scale -a rule or a penny-. I can help you editing once you upload the pict. I know the editor is anoying for first time. btw welcome to the site I forgot it :) – Universal_learner Oct 10 at 16:30

Your rock looks to me like an agate (chalcedony). The hardness is perhaps a bit too hard, should be near 7 for agate, but the values are within experimental error. The main reason I believe the rock to be an agate is the hardness and the conchoidal fractures I see in the image, also I have collected a large number of similar looking rocks from Tonopah Nevada, which I have positively identified as agate. The ones from Tonopah also have the white inclusions similar to your sample.

If you search for "Carnelian Yellow Rough" in google images you will find some images of rocks with similar color and luster. Wikipedia has a brief article on Carnelian but it isn't too descriptive of the raw material.

Agate, jasper, chert, chalcedony, and carnelian are all really similar in that the main constituent of the rock is Cryptocrystalline Quartz. The colors are primarily various impurities in the quartz. I have looked online for a really good image but haven't found any. I will try and go through my personal collection and see if I can get a similar looking sample.

Your Answer


By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Not the answer you're looking for? Browse other questions tagged or ask your own question.