Can anyone help identify these?
These rocks came in a bag of tumbling stones and I have tried using this app, Rock Identifier, to ID them but it have me inconsistent reports. It says it could be Chrysocolla in Quartz, or Aurichalcite, or Quartz, or Agate, or Brochantite.
They are very similar to real other, but two of them have a more bluish tint and the other two have more of a greenish tint. I'd just enough of a difference that I think they could be different, but it wouldn't surprise me if they are the same.
I'm trying to determine their hardness values for tumbling. The problem is, the rocks they have been identified as range from 3 to 7, so I don't want to just throw them in with a batch and hope they don't fall apart.
I do see some quartz in there. I keep trying to zoom in but then imagur switches me to some bullshit about net neutrality.
Maybe posting them here will be better?
Update: most likely Quartz, Azurite, and Malichite, all mixed together to get that weird crystal and color pattern.
Finally got around to talking to a gemologist.
Awesome, thanks for tracking that down!
Thank you!
I preface this by saying that I’m just a very amateur hobbyist, and even an expert would never 100% call a stone without physically seeing it, so if you really, really want to know I’d ask a gemologist. The ones in my area throw fairs a few times a year, and I’ve found many jewelers can actually be quite helpful about id-ing a stone, especially if you approach them on a slow day.
But to me the crystals look entirely wrong for agate and don’t seem quite the right shade of green for Prasiolite. The crystals don’t seem quite right in color or shape for Brochantite either.
Aurichalcite is a possibility for the stones in the second pic, although the crystals don’t look as orderly as Aurichalcite usually does.
The left stone in the first pic looks a bit like low-quality beryl, actually. Although I might see banding? Which would be more a calcite or fluorite thing. It’s hard to tell in the photo if it’s actual banding or just light play off broken crystal.
The right stone in the first pic might be chrysocolla, although usually it forms nodules rather than crystals like that. Calcite or fluorite might make more sense for that one too.
I think they look like malachite and lazurite, possibly coated in apophyllite.
Looks a bit like oxidized copper.
If it was, could I apply anything to remove the oxidation?
Citric acid is what I use. Easy to find, safe to handle. However, if these aren't copper, and are in fact malachite, you'll be destroying it for nothing.
They stole the stone of scone!