found this rock last year

[utah1066]

found this one last year what is it? big green rock

 

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[utah1066]

Have a few that look similar.. Emerald and the black areas are ether a matrix of some sort.. or I have had someone tell me the black areas are "Star Sapphire" Matrix.. So no, its no uncommon to find something with a wide range of different minerals all in one specimen.

It has most of the color and characteristic to an Emerald in a matrix.. But do me a favor.. clean the rock and leave it wet then grab a shot.

ok i cleaned it

 

[lordpiney]

looks like variscite to me. did you find it in utah?

 

[utah1066]

looks like variscite to me. did you find it in utah?

no it was in AZ, or Texas found it in an old river bed.

 

[Pull_tab_mike]

maybe JADE,................

 

[Eu_citzen]

Never ever photograph a mineral wet if not Labradorite or opal rough..
It doesn't show us the lustre.

As for what it is.. I am uncertain. Serpentine would be scratched with a knife, most other alternatives would not.

The "black" areas look like re-filled cracks.

 

[utah1066]

Never ever photograph a mineral wet if not Labradorite or opal rough..
It doesn't show us the lustre.

As for what it is.. I am uncertain. Serpentine would be scratched with a knife, most other alternatives would not.

The "black" areas look like re-filled cracks.

ok some one ask me to wash it then take photos of it, and put them on here. but its not been filled in its just the way it looks if you wish i can put more dry photos

 

[geologyjohn]

From this distance, looks like a piece of chert to me. Lots of it in California. Geologyjohn.