May I get a read

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May I get a read

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jim hill

Joined: 03 Sep 2017
Posts: 48
Location: Bessemer, PA

Posted: Dec 01, 2021 06:44 Post subject: May I get a read

Specific gravity 3.39 to 3.50 hardness above 8
The black lines I believe come from separation of pieces.

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Found in hometown of bessemer

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5335 Time(s)

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5337 Time(s)

20211201_062412.jpg

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5338 Time(s)

20210714_005557.jpg

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5331 Time(s)

Bob Carnein

Joined: 22 Aug 2013
Posts: 353
Location: Florissant, CO

Posted: Dec 01, 2021 10:19 Post subject: Re: May I get a read

May I ask how you measured SG and hardness? It looks to me like quartz.

Kevin Schofield

Joined: 05 Jan 2018
Posts: 169
Location: Beacon NY

Posted: Dec 01, 2021 10:59 Post subject: Re: May I get a read

jim hill wrote:

Specific gravity 3.39 to 3.50 hardness above 8
The black lines I believe come from separation of pieces

Conchoidal fracture, vitreous luster on fracture planes...it's a chert/flint nodule. You have over-estimated the hardness.
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Veni, Vidi, Emi

alfredo
Site Admin

Joined: 30 Jan 2008
Posts: 1011

Posted: Dec 01, 2021 11:31 Post subject: Re: May I get a read

I agree with Bob and Kevin. The density and hardness seem to be wrong. Looks like quartz.

James Catmur
Site Admin

Joined: 14 Sep 2006
Posts: 1462
Location: Cambridge

Posted: Dec 01, 2021 15:07 Post subject: Re: May I get a read

I agree too

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