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i've found a stone in a cave during my trip,help me find out

akatherolexguy

Rough_Rock
Joined
Aug 11, 2016
Messages
1
hello folks i had found a stone and its roughly around 5kg in weight i found it in a cave during my trip to the middle east

here are afew pictures of the stone
when i put it under the sun i can hardly see inside the front surface not very deep and it's kinda pink or lightish red inside it
i'd appreciate it if you guys tell me what it is , and whether that''s valuable or not , if yes, how much will it be?
thanks in advance

**edited by moderator, no externally hosted pics**
thanks
 

qubitasaurus

Brilliant_Rock
Premium
Joined
Dec 18, 2014
Messages
1,118
Re: i've found a stone in a cave during my trip,help me find

You will get more responses if you upload the images directly to the forum (so that they are embedded inside your post).

I am completely clueless about geology, but I am curious as to how the stone ended up such a regular geometric shape, with such smooth faces.
 

chrono

Super_Ideal_Rock
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Joined
Apr 22, 2004
Messages
37,365
Re: i've found a stone in a cave during my trip,help me find

The size, shape, and lines I see in the picture reminds me very strongly of synthetic boule, probably synthetic purple sapphire or synthetic amethyst.

purple_block.jpg
 

GregS

Brilliant_Rock
Joined
Sep 5, 2012
Messages
717
Re: i've found a stone in a cave during my trip,help me find

If it is synthetic I wonder what it was doing in a cave?
 

chrono

Super_Ideal_Rock
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Re: i've found a stone in a cave during my trip,help me find

GregS|1470937893|4064822 said:
If it is synthetic I wonder what it was doing in a cave?
Someone cutting pieces of it off and sprinkling it in with some natural rough, then selling it all as a parcel? Who knows.
 

maccers

Brilliant_Rock
Joined
Sep 19, 2012
Messages
1,166
Re: i've found a stone in a cave during my trip,help me find

Reminds me of obsidian (volcanic glass) based on the cleave marks. But I'm not sure if obsidian is ever purple.
 

PrecisionGem

Brilliant_Rock
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1,701
Re: i've found a stone in a cave during my trip,help me find

looks like obsidian to me too. Have never seen lab created stone that large, or that shape. Most lab created sapphire and spinel look like a condom, about the same size too.
 

dk168

Ideal_Rock
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Jul 7, 2013
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5,630
Re: i've found a stone in a cave during my trip,help me find

Looks like the piece of Obsidian in my house too.

DK :))
 

chrono

Super_Ideal_Rock
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37,365
Re: i've found a stone in a cave during my trip,help me find

I learned something new today: obsidian doesn't just come in black, but some are a dark purple too. :read:
 

Nsmike

Rough_Rock
Joined
Jul 17, 2016
Messages
89
Re: i've found a stone in a cave during my trip,help me find

Obsidian may come in a purplish color but natural stone doesn't come a rounded square shape with a flat bottom. A boule of lab created gem material easily can.
 

DAF

Shiny_Rock
Premium
Joined
Jan 7, 2012
Messages
374
Re: i've found a stone in a cave during my trip,help me find

maccers|1470940972|4064849 said:
Reminds me of obsidian (volcanic glass) based on the cleave marks. But I'm not sure if obsidian is ever purple.
+1
Obsidian can show up with the purplish color.
 

PrecisionGem

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Re: i've found a stone in a cave during my trip,help me find

Nsmike|1471271421|4066234 said:
Obsidian may come in a purplish color but natural stone doesn't come a rounded square shape with a flat bottom. A boule of lab created gem material easily can.
I have seen many lab created boules, but never one that shape or size. Here is a typical spinel boule I have. Sapphire boules are most always split to release the stress in them.
If it was a boule, why would someone put it in a cave? While this lab created boules are not very expensive, one that size would a few hundred dollars.
I really don't think it is a lab created boule.

img_0644.jpg
 

Nsmike

Rough_Rock
Joined
Jul 17, 2016
Messages
89
Re: i've found a stone in a cave during my trip,help me find

PrecisionGem|1471357177|4066577 said:
Nsmike|1471271421|4066234 said:
Obsidian may come in a purplish color but natural stone doesn't come a rounded square shape with a flat bottom. A boule of lab created gem material easily can.
I have seen many lab created boules, but never one that shape or size. Here is a typical spinel boule I have. Sapphire boules are most always split to release the stress in them.
If it was a boule, why would someone put it in a cave? While this lab created boules are not very expensive, one that size would a few hundred dollars.
I really don't think it is a lab created boule.
You might want to check out this page http://www.atggems.com/Rough_Alex-Syn.htm it shows a hexagonal pull of synthetic alexandrite. I have also found synthetic topaz where the boule is square.
 

deskjockey

Brilliant_Rock
Joined
May 10, 2013
Messages
544
Re: i've found a stone in a cave during my trip,help me find

Nsmike|1471362080|4066598 said:
PrecisionGem|1471357177|4066577 said:
Nsmike|1471271421|4066234 said:
Obsidian may come in a purplish color but natural stone doesn't come a rounded square shape with a flat bottom. A boule of lab created gem material easily can.
I have seen many lab created boules, but never one that shape or size. Here is a typical spinel boule I have. Sapphire boules are most always split to release the stress in them.
If it was a boule, why would someone put it in a cave? While this lab created boules are not very expensive, one that size would a few hundred dollars.
I really don't think it is a lab created boule.
You might want to check out this page http://www.atggems.com/Rough_Alex-Syn.htm it shows a hexagonal pull of synthetic alexandrite. I have also found synthetic topaz where the boule is square.
But that large?

I know nothing about this stuff but seems like if it were anything manmade to simulate a gem it wouldn't be in such a large and unworkable piece.

(that said I'm wondering if it's some kind of waste product glass from manufacture, just from the shape and overall lack of damage/fracture, but I'm as far from an expert as it gets, LOL)
 

Nsmike

Rough_Rock
Joined
Jul 17, 2016
Messages
89
Re: i've found a stone in a cave during my trip,help me find

deskjockey|1471380330|4066665 said:
Nsmike|1471362080|4066598 said:
PrecisionGem|1471357177|4066577 said:
Nsmike|1471271421|4066234 said:
Obsidian may come in a purplish color but natural stone doesn't come a rounded square shape with a flat bottom. A boule of lab created gem material easily can.
I have seen many lab created boules, but never one that shape or size. Here is a typical spinel boule I have. Sapphire boules are most always split to release the stress in them.
If it was a boule, why would someone put it in a cave? While this lab created boules are not very expensive, one that size would a few hundred dollars.
I really don't think it is a lab created boule.
You might want to check out this page http://www.atggems.com/Rough_Alex-Syn.htm it shows a hexagonal pull of synthetic alexandrite. I have also found synthetic topaz where the boule is square.
But that large?

I know nothing about this stuff but seems like if it were anything manmade to simulate a gem it wouldn't be in such a large and unworkable piece.

(that said I'm wondering if it's some kind of waste product glass from manufacture, just from the shape and overall lack of damage/fracture, but I'm as far from an expert as it gets, LOL)
Actually lab sapphire boules can be up to 24 inches across. The largest boules are used to make clear panes for instruments. The article I linked to on synthetic alexanderite shows a large boule being held in the hand and is in fact a waste product from producing rods for lasers.
 

Quantz Studios

Shiny_Rock
Trade
Joined
Sep 12, 2009
Messages
119
Re: i've found a stone in a cave during my trip,help me find

In my opinion, this looks like glass. Whether obsidian or of industrial origin, I'm willing to bet glass. The side(s) that are being held appear to me to have the appearance and patterning of being worked on a grinding wheel of some sort... Just my opinion.
 

arkieb1

Ideal_Rock
Premium
Joined
May 11, 2012
Messages
9,516
Re: i've found a stone in a cave during my trip,help me find

I've seen lab created boules that size at a gemshow here in Australia that were Chinese in origin. That would be my guess too, or it could be a big hunk of obsidian. It's odd it was lying around in a cave.
 

kenny

Super_Ideal_Rock
Premium
Joined
Apr 30, 2005
Messages
28,163
Re: i've found a stone in a cave during my trip,help me find

GregS|1470937893|4064822 said:
If it is synthetic I wonder what it was doing in a cave?
Must be one of those synthetic caves. :sun:
 
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