Would this be grossular green garnet

[G.O.Eye]

While on of my fun hikes I came across this, it's gemmy an somewhat translucent, kinda at least to light, the first pic I'm holding the stone against a light, the second is the stone, the third on the scale, any ideas and as always thanks for the commits an help.

 

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[Eu_citzen]

Have you tried scratching it with quartz?

 

[MrLee]

Uvarovite?

 

[G.O.Eye]

Otay EU as always I forget the scratch test, so got on that, I have the picture results, the poor quartz crystal lost this battle(The first pic is the two fighters, The Second pic is the scratch white dust from quartz, the Third under 10x mag square box is the area scratched, the Fourth is the winner an loser) MrLee nice didn't think of that but Uvarovite occurs as well-formed fine-sized small crystal cluster from what I saw most of the time, if this is uvarovite nice the two are closely related.

 

[MrLee]

Ya, I didn't think it was, but it's green! Uvarovite can be big. I have some the size of your fingernail from San Benito Mtns.

 

[mamabear]

Jadeite?

 

[Eu_citzen]

I kind of doubt it is grossular. Olivine could be more likely, if it feels slightly heavy for its size. Otherwise you may have to break it open and look at the lustre for further hints.

 

[MrLee]

Good call Mama. Forgot about that. Nephrite?

 

[G.O.Eye]

Ok, I have a video to get a better look at the stone, it's slightly heavier for it's size but I believe by only a few grams maybe four grams but I'm not that experience on specific gravity and for some reason the stone gets unusually cold fast by room temp air, one more thong it has a greasy feel to it don't know if that's useful, thank you guys a bunch for the info, you guy rock.

 

[Jim in Idaho]

Looks like it has some cleavage planes, so probably not garnet. Same goes for olivine. Might be some form of chalcedony. Need to do a specific gravity test.
Jim

 

[G.O.Eye]

Ok, so I've done a home base specific gravity test on the green goblin and from the math an I hate math the numbers came out to about 2.62 or 2.6258564 blah, which is a good thing helps narrow it down, now to find out what's green an has that specific gravity, thanks Jim that helped.

 

[Jim in Idaho]

The specific gravity of chalcedony is 2.59 - 2.61 We have lots of pale green chalcedony on southern Idaho
Jim

 

[G.O.Eye]

I want to believe that to be true but the problem I have is that agate or chalcedony same family cryptocrystalline quartz and moganite mixture, agate being banded and multi-colored, the more impurities in the stone the weaker it becomes on the mohs scale, if chalcedony (this green goblin) then a pure quartz rock crystal should scratch it, instead it's just grinding the quartz rock crystal and not a mark on the green goblin even after examining it under the 10x magnification, I have did the specific gravity test again three times to be sure it's actually 2.64, another scratch test, the 1st pic as you guys know pure quartz crystal, 2nd the scratch mark from the quartz, the 3rd once again is the area scratched by quartz cleaned up an under 10x mag, not trying to be to redundant.

 

[Jim in Idaho]

I can't think of another hard gem that has that low a S.G. Most gems are from 3.5 to 4.2. Definitely a puzzle.
Jim

 

[Jim in Idaho]

How about a beryl, of some sort. Very hard, and SG around 2.7
Jim

 

[golden sluice]

Is It one of the shankari stones from indana jones and the temple of doom?

I think its time to watch indana jones.

 

[Eu_citzen]

A specific gravity of 2.64 is very close to quartz SG of 2.65. If they have the same hardness that would explain why you see no scratches.
So I'd say you got a chalcedony there.