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What kind of rock is this?

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I found this rock in seashore, its heavy than other stone of same size..


I found this rock in the shore, with approximate size of 8x3x6cm. Its heavier than other stone of same size. Translucent, and there are cracks. The color is majority of white..

Please tell me what kind of stone is this. and if I can make money out of this. Thanks

asked Sep 18, 2018 by marcelod3rdsaplagio (120 points)

3 Answers

0 votes
This rock appears to be quartz
answered Sep 18, 2018 by Weasel (58,980 points)
0 votes
To me, it looks like a low-grade opal. Quartz doesn't weather down like that. It could be chalcedony as well. In conclusion, probably not worth that much to a well-known lapidary, but you might be able to sell it to a local artist.
answered Sep 19, 2018 by linkisnotzelda (5,390 points)
Chalcedony would not have cracks in it...the staining appears to be limonite, an iron staining. Chalcedony doesn't crack. It would chip. It really is smooth enough to be chalcedony when you enlarge it. Maybe the cracks you see are between the host rock and the chalcedony. Still not valuable, but as valuable as whatever someone will pay.
0 votes

Hello, to me this rock looks like chalcedone due to its red bubble like surface. Here’s some pictures of rough chalcedone I’ve found in the picture below. Hope this helps out. 

Kind regards,


answered Sep 22, 2018 by Lemurian (950 points)

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