Rock ID
- Thread starter Paul1456
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Smokey quartz or volcanic glass maybe?
Thanks Greg
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I’m not sure just a guess, hopefully one of the more knowledgeable members will chime in
Yeah hope so...i was thinking Painite
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Have you tried putting a light source behind it?
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Does appear to have some red in it
Looks like a cluster of smokey quartz to me as well that's still in the host rock.
As Greg said could also be obsidian (volcanic glass).
As Greg said could also be obsidian (volcanic glass).
Is it very heavy for its size?.. Maybe a SG test may shed some light...
LW...
LW...
SG test?
196 grams
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Have a read through this Topic....https://www.prospectingaustralia.com/threads/series-on-identifying-minerals.24758/
Or google 'SG Test'.....
LW...
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Heavy like Lead or not quite or feels like a rock for its size..... A pic on a scale is no help to me as im not there... What im getting at is it could be Galena...
Galena is very heavy as its a member of the 'Lead' family...
A in-focus closer pic will help and a rough location is even better as we can narrow down what it is..
LW...
Galena is very heavy as its a member of the 'Lead' family...
A in-focus closer pic will help and a rough location is even better as we can narrow down what it is..
LW...
Smokey quartz has a hardness of 7 and volcanic glass (obsidian) 5 -5.5 on the mohs scale.
if you can scratch it with corundum sand paper or a masonary bit but not with a steel nail then it is most likely quartz. Obsidian will be easily scratched by a known piece of quartz or even a steel nail.
If all fails the Museum of Victoria (probably other states as well) has a minerals identification service.
if you can scratch it with corundum sand paper or a masonary bit but not with a steel nail then it is most likely quartz. Obsidian will be easily scratched by a known piece of quartz or even a steel nail.
If all fails the Museum of Victoria (probably other states as well) has a minerals identification service.
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thanks mate, yeah waiting for Museum Vic to get back to me
I believe it's quartz, as others have said. A diagnostic feature is the conchoidal fracture that's especially evident just above the middle finger. Some of the smaller crystals are oriented that they show, on close inspection, a hexagonal shape and there are other crystal faces visible. Obsidian is a glass, no crystal structure visible and is uniformly black ... that is to say, this not a volcanic glass.
Hopefully these are better pictures. It feels dense not super heavy 196 grams. Does not scratch easily with the blade of a Swiss army knife. Found it in a laneway in Melbourne.
Going by you pics, Smokey Quartz Cluster with Host quartz and 'rock' with it... There is a bit of 'reflection' in some pics so .... My Guess... Your Picture No 3 is the right Orientation For your Sample...
LW...
LW...
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