Cakewalk Posted October 6, 2012 Share Posted October 6, 2012 I picked up this piece of quartz a few days ago and was wonding if anyone can tell me about the bottom layer and what is causing the pattern that the quartz is growing on. It appears to cover the entire bottom. This is the first time I have seen this.Any insight is appreciated. Quote Link to comment Share on other sites More sharing options...
homefire Posted October 6, 2012 Share Posted October 6, 2012 Looks like Quartz to me.The Crystals just formed better in the Open Cavity. Quote Link to comment Share on other sites More sharing options...
Steel Pan Posted October 6, 2012 Share Posted October 6, 2012 A lateral geode in/with quartz. (...unless ya stand it on end and then it's a verticle geode. ) From a bubble in the fractured host or mother rock that the injecting quartz didn't quite fill, thus giving room for larger crystal growth.Not a rare development at all, I've come across this formation in bedrock many times. Actually found quartz that appeared to be like foam, very similar to what you would find at the ocean's shore, ya know, sea foam. That was in the bedrock of the American River just outside of Colfax, Ca.Geology does some really cool stuff. Quote Link to comment Share on other sites More sharing options...
adam Posted October 7, 2012 Share Posted October 7, 2012 Looks like Calcite Quote Link to comment Share on other sites More sharing options...
Cakewalk Posted October 8, 2012 Author Share Posted October 8, 2012 A lateral geode in/with quartz. (...unless ya stand it on end and then it's a verticle geode. ) From a bubble in the fractured host or mother rock that the injecting quartz didn't quite fill, thus giving room for larger crystal growth.Not a rare development at all, I've come across this formation in bedrock many times. Actually found quartz that appeared to be like foam, very similar to what you would find at the ocean's shore, ya know, sea foam. That was in the bedrock of the American River just outside of Colfax, Ca.Geology does some really cool stuff. Thank you for the info - I think its a pretty cool speciman Quote Link to comment Share on other sites More sharing options...
Goldfinger Posted October 9, 2012 Share Posted October 9, 2012 Use vinegar to check for calcite... Will slowly bubble upon contact.Steve Quote Link to comment Share on other sites More sharing options...
Haderly Posted October 9, 2012 Share Posted October 9, 2012 Looks like CalciteI am thinking the same. Quote Link to comment Share on other sites More sharing options...
Denkidude Posted October 18, 2012 Share Posted October 18, 2012 Looks like quartz grew on top of possibly barite? Originally was the bottom crystals then the quartz filled in on top. Crystal structure looks like barite but probably replaced with calcite or chalcedony(agate) Definately a geode type environment. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.