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Common Rock resembling Tiger's Eye

0 votes

I found a common garden rock on my friends place in Illinois and the colors remind me of Tiger's Eye which I am fond of so she let me keep it. I obviously know it is not Tiger's Eye in all probability, but I am wondering what it is exactly? Please excuse my naiveté when it comes to stone identification- I'm new to the field but find it fascinating!

I am hopefully you can shed more light on this question!

Thanks in advance! Kat

~Branches from the nearby foliage, or geological specimens, may fracture my skeletal structure; however, inaccurate descriptions of my physical appearance, heritage or personality, cannot damage my psyche. alt text

asked Aug 3, 2012 by Mourning_Star (720 points)

Actually took it to a jeweler I knew today, he said it definitely wasn't tiger's eye but couldn't tell what it was from sight alone-said to look into more geology then gems.

5 Answers

0 votes

Well, that definitely does like Tiger's Eye! It looks like it was polished and then exposed to the elements for quite some time. To my knowledge there are no Tiger's Eye occurrence in Illinois, so its probably a transplant from South Africa.

answered Aug 6, 2012 by hershel (44,400 points)

I agree but it's massive, nearly the size of my fist! Is this even possible? How would I tell?

0 votes

Sure its possible. Tiger's Eye can be quite large. Can you test its hardness? See if it has a hardness of 6.5 - 7. Also is it chatoyant with a light color effect?

answered Aug 9, 2012 by hershel (44,400 points)

I'd have to look up Chatoyant to compare. As far as hardness goes, I have no equipment to test it's hardness. I imagine that it would take effort to be even scratched by a knife, but that theory is based on bulk and size of the rock (it's about as big as a closed fist!)

0 votes

Chatoyant means it exhibits a wavy effect on internal fibers in the light. Tiger's Eye is strongly chatoyant. A knife has a hardness of about 5.5 so if the knife doesn't scratch it, at least you'll know its hardness is greater then 5.5.

answered Mar 4, 2014 by hershel (44,400 points)
0 votes

Chatoyant means it exhibits a wavy effect on internal fibers in the light. Tiger's Eye is strongly chatoyant. A knife has a hardness of about 5.5 so if the knife doesn't scratch it, at least you'll know its hardness is greater then 5.5.

answered Mar 4, 2014 by hershel (44,400 points)
0 votes
answered Mar 20, 2014 by Renata (7,820 points)
 


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