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ALshawani
Joined: 08 Feb 2020
Posts: 38
Location: Africa
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 Posted: Feb 23, 2021 16:12 Post subject: I want to know this stone |
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I didn't recognize the stone yet, the density of stone from 2.60 to 2.99
The hardness is higher than 8.5
| Mineral: | don't Know |
| Description: |
West of Libya
4.5*3
I didn't recognize the stone yet, the density of stone from 2.60 to 2.99
The hardness is higher than 8.5 |
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6938 Time(s) |
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ALshawani
Joined: 08 Feb 2020
Posts: 38
Location: Africa
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| Posted: Feb 23, 2021 16:15 Post subject: Re: I want to know this stone |
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This is the same type
| Mineral: | don't Know |
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6930 Time(s) |
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Bob Carnein
Joined: 22 Aug 2013
Posts: 327
Location: Florissant, CO
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| Posted: Feb 23, 2021 16:16 Post subject: Re: I want to know this stone |
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| It looks, to me, like a piece of quartzite. How did you measure the hardness?
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ALshawani
Joined: 08 Feb 2020
Posts: 38
Location: Africa
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| Posted: Feb 23, 2021 16:44 Post subject: Re: I want to know this stone |
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| with Masonry Drill Bit
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kushmeja
Joined: 28 Jul 2014
Posts: 244
Location: New Jersey
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| Posted: Feb 23, 2021 16:56 Post subject: Re: I want to know this stone |
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| Looks like carnelian or sard, which are basically just slightly different forms of Quartz. But they wouldn't be an 8.5 hardness and should be closer to 7. An 8.5 hardness is quite high, so I would try verifying the hardness with something aside from the masonry bit if you can.
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alfredo
Site Admin
Joined: 30 Jan 2008
Posts: 979
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| Posted: Feb 23, 2021 17:08 Post subject: Re: I want to know this stone |
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| Being as opaque as it is, I'd call it jasper, although the boundaries between quartz varieties are rather fuzzy.
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James Catmur
Site Admin
Joined: 14 Sep 2006
Posts: 1343
Location: Cambridge
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| Posted: Feb 24, 2021 03:33 Post subject: Re: I want to know this stone |
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| Does it scratch normal glass?
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ALshawani
Joined: 08 Feb 2020
Posts: 38
Location: Africa
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| Posted: Feb 24, 2021 06:16 Post subject: Re: I want to know this stone |
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| I tried the knife and the screw and finally the bit of the drill, and they were all scratched by the stone. The thing that revived me the most is the hardness of the stone.
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ALshawani
Joined: 08 Feb 2020
Posts: 38
Location: Africa
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| Posted: Feb 24, 2021 06:18 Post subject: Re: I want to know this stone |
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| Yes it scratches the glass
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ALshawani
Joined: 08 Feb 2020
Posts: 38
Location: Africa
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| Posted: Feb 24, 2021 06:27 Post subject: Re: I want to know this stone |
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The stone is translucent to translucent. Perhaps some external impurities are affecting the transparency
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6743 Time(s) |
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ALshawani
Joined: 08 Feb 2020
Posts: 38
Location: Africa
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| Posted: Feb 28, 2021 15:50 Post subject: Re: I want to know this stone |
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| What tools are available at home that can measure the hardness of any stone? What is the degree of hardness of each tool?
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Volkmar Stingl
Joined: 23 Sep 2012
Posts: 838
Location: Innsbruck
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