jcervay 41 Posted June 15, 2018 Share Posted June 15, 2018 All 3 have the same dual color. Quartz? I'm really a rookie, not sure 1 Quote Link to post Share on other sites
azdigger 1,474 Posted June 15, 2018 Share Posted June 15, 2018 Not sure of what it is , but what it is , is cool looking. 1 Quote Link to post Share on other sites
Saul R W 741 Posted June 15, 2018 Share Posted June 15, 2018 Check the hardness, for starters. See here: https://geology.com/minerals/mohs-hardness-scale.shtml And yep, it is a cool looking piece. 1 Quote Link to post Share on other sites
Morlock 1,637 Posted June 15, 2018 Share Posted June 15, 2018 Citrine is quartz that has small quantities of iron in it. You have a light yellow and brown layers. Those are citrine..You also have a gray layer which I'm not sure of. 1 Quote Link to post Share on other sites
jcervay 41 Posted June 15, 2018 Author Share Posted June 15, 2018 55 minutes ago, Saul R W said: Check the hardness, for starters. See here: https://geology.com/minerals/mohs-hardness-scale.shtml And yep, it is a cool looking piece. Great idea! I'll do that Quote Link to post Share on other sites
jcervay 41 Posted June 15, 2018 Author Share Posted June 15, 2018 Doesn't scratch glass, obviously scratched by quartz. Reacts to vinegar. Not citrine I don't think. Calcite? Thoughts? 1 Quote Link to post Share on other sites
d_day 326 Posted June 15, 2018 Share Posted June 15, 2018 (edited) I'm going to say calcite and aragonite. In fact, I'm going to get a little more specific and say you've probably got some fragments from a septarian nodule, like this one. Edited June 15, 2018 by d_day 1 Quote Link to post Share on other sites
jcervay 41 Posted June 15, 2018 Author Share Posted June 15, 2018 36 minutes ago, d_day said: I'm going to say calcite and aragonite. In fact, I'm going to get a little more specific and say you've probably got some fragments from a septarian nodule, like this one. I was just starting to think the Sam thing. Not the nodule bit, but it makes me extremely sad that if it was, it's broken 1 Quote Link to post Share on other sites
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