Lapidaryforum.net
Let's Rock => Identifications of Materials => Topic started by: Jhon P on July 10, 2017, 06:55:51 AM
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My brother is a contractor in Fresno ca and part of his business is taking over foreclosures, cleaning them up and getting them ready to sell. He is always looking for rocks for me and he brought me a bucket full and this was in there. I thought that it was howlite but is is close to a 7 hardness and doesn't look like it. Any ideas?
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could it be corpolite? hope that's the right word for dino dung.
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Maybe? It looks a little like a turd.
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Dino doo-doo is coprolite.
https://en.wikipedia.org/wiki/Coprolite
I can't exactly tell from the photo, but it looks a little dendritic to me. Are those darker lines dendrites?
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The outer surface makes it look like magnesite
Bob
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Magnesite sounds like a bullseye. I wouldn't have thought of it without bobby1's comment, but the color is similar to the color of magnesite (or lemon) chrysoprase.
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Ive had Howlite the outer surface looked like that and cut sometimes white to grey to spotted black
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Magnesite. The pure white material from Nevada is known as Pristine Magnesite.
https://www.youtube.com/watch?v=BHkpG5KQjAw
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Magnesite is only mohs 3.5 to 4.5.
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Hardness is what has me stumped. It is closer to 7 maybe 6 1/2.
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Perhaps a common opal? What type of fracture does it have?
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Not opal.
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Magnesite is only mohs 3.5 to 4.5.
Pristine appears to be harder and might be silicated to some extent. Takes a good polish also.
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Hardness is what has me stumped. It is closer to 7 maybe 6 1/2.
Really? Can you scratch a clear quartz crystal with it? What about scratching a glass bottle?
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I have a MOH’s hardness testing kit. I can barely scratch it with #7 cannot scratch it with a #6
But it sure looks like a howlite nodule on the outside to me. The piece that I cut off took a good polish. Maybe it is a jasper nodule?
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Once it's round you'll be able to tell lol, I have no clue...
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It’s not big enough to make it worth the effort.
I may get a 1 1/2” marble out of it?
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so it's been determined not to be corporlite? perhaps it's in transition from one type of rock into another (like some serpentine turning into jade).
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John watching the post it appears to be some sort of jasper to be that hard that's my opinion.
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I figured it out. It’s a sex rock!
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Nah Jhon. It's pretrified cauliflower.