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 Post subject: SAPPHIRE?...
PostPosted: Wed Nov 29, 2017 1:44 am 
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SAPPHIRE?...
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 Post subject: Re: SAPPHIRE?...
PostPosted: Wed Nov 29, 2017 4:45 pm 
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Could be, it does have a resemblance to lower-grade Indian schist-hosted material. Some of these star though they generally don't produce valuable gems.

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 Post subject: Re: SAPPHIRE?...
PostPosted: Wed Nov 29, 2017 4:55 pm 
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Could also be quartz. Can you lift it? Is it REALLY heavy? From what it looks like, it should weigh a LOT if it is sapphire.


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 Post subject: Re: SAPPHIRE?...
PostPosted: Wed Nov 29, 2017 5:54 pm 
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Stratch it.


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 Post subject: Re: SAPPHIRE?...
PostPosted: Thu Nov 30, 2017 1:32 am 
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Dr Hanneman has a great idea. Everyone should have a set of hardness points. :D


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 Post subject: Re: SAPPHIRE?...
PostPosted: Thu Nov 30, 2017 6:47 am 
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It's 7"X4"
TCW 9980
Paid 160$ for it...I hope I didn't spend too much #-o
What do you think?...
Can't wait to break it into pieces :lol:
here's another pic
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 Post subject: Re: SAPPHIRE?...
PostPosted: Thu Nov 30, 2017 5:59 pm 
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Estimating a sphere of radius 2.75" (5.5" diameter - the average of 7 and 4), would be a radius of about 7cm.

the volume of a sphere is (4/3)Pi r^3, so we get a volume of 1,436 cc's. Sapphire is about 4 gm/cc, so this would be 20 carats/cc or approx 28,735 carats.

You have between 1/3 and 1/2 of that. BUT it isn't a sphere and with another dimension it might be smaller. And it might not be "pure". Mica doesn't weigh much.

quarts is 2.71 or 13.5 carats/gm or 19,467 carats under the same calculation.

Best guess from this: I don't know. :-). But it was fun to try.


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 Post subject: Re: SAPPHIRE?...
PostPosted: Thu Nov 30, 2017 6:22 pm 
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Big thanks, everyone!
Will update with the results after receiving and breaking it.
fun it is to try for sure :lol:


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 Post subject: Re: SAPPHIRE?...
PostPosted: Fri Dec 01, 2017 2:43 pm 
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Please be aware that the majority of corundum in the world is made into sandpaper.
Just because it is sapphire does not make it gem quality.


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 Post subject: Re: SAPPHIRE?...
PostPosted: Fri Dec 01, 2017 9:47 pm 
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I do love this kind of material, even though it's not worth much. Those papers ain't goin' NOWHERE.

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 Post subject: Re: SAPPHIRE?...
PostPosted: Sat Dec 02, 2017 7:53 pm 
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But do you like it as a specimen, Stephen, or would you break it up and cab some?

I'd definitely put it on my specimen shelf.


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 Post subject: Re: SAPPHIRE?...
PostPosted: Sun Dec 03, 2017 4:54 pm 
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Oh yeah, I'm in agreement with you on that--it's not monocrystalline so you aren't getting any good novelty-size stars out of it, and smaller Indian star rough is inexpensive, lets you cut a variety of colors and since it comes as crystals you don't need to work hard to find the c-axis or to establish the outline of the cab.

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 Post subject: Re: SAPPHIRE?...
PostPosted: Sun Dec 03, 2017 8:47 pm 
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Solomon wrote:
Can't wait to break it into pieces :lol:
here's another pic


I hope that you're not serious! The value of the item is as a specimen, and breaking it apart would destroy its value.


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 Post subject: Re: SAPPHIRE?...
PostPosted: Mon Dec 04, 2017 12:12 am 
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Okay Good to know...
To the shelf then.
(I keep hearing that voice in my head though. it says "Break it break it break it" :twisted: :lol:)


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 Post subject: Re: SAPPHIRE?...
PostPosted: Mon Dec 04, 2017 12:52 am 
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Yes, that is the voice of evil Mr. Emery. Don't let him win.
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