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Large gemstone (amber?) found in Balkans

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We got our hands on one large and two smaller gemstones. We believe this is amber but would like a confirmation. Any clues as to how much is it worth?

 

 

 

 

 

 

 

 

 

Picture below shows dimensions of the larger rock

 

asked Jul 19, 2015 by Noledele (120 points)
edited Jul 20, 2015 by Noledele

1 Answer

0 votes
Conchoidal fractures indicate gems/stones are very hard. Recommend findind a lapidary who could appraise and cut your stones. He can also help you with testing for hardness and weighing what you have in Carats and tell you about inclusions, color and quality. Could be topaz, diamond or sapphire...not the onle possibilities.
answered Jul 19, 2015 by Weasel (40,320 points)
Thanks for your input. I'm yet to find knowledgable/reputable expert in the area. All three rocks/gems were found in the same river but not the location. Do you think that all three are of the same kind?

Did you rule out Amber or that's also one of the possibilities?
Conchoidal fractures indicate a hard stone, very hard, which chips instead of cracking. I think Amber or topaz and the white stone is sapphire or diamond or even Topaz. Very hard to tell from what limited information. A lapidary is a gem cutter or a stone cutter. Look up lapidary or a local rock club and they should have one or know a local one. There are tests. Does your rock scratch glass or does glass scratch it. You could weigh your rock and give us the volume and we could figure out specific density. You could go to a jeweler and he has a machine which could tell you what it is. I really like the big piece, the mineral striations are really cool. The other stones look to be gem quality but I am no expert.
Smaller rock scratch the glass but the larger stone is being scratched by the glass. The larger one is 920 weights 925 grams.
There are beakers used to measure the volume of an object from science class. Beakers and graduated cylinders. Filled with water, merely place the specimen in the water until submerged. That will displace water equal to it's volume. Then it is a simple matter to determine the specific density.. The stone, I'd wager the white one, scratched glass and indicates extreme hardness like diamond or sapphire. Take it to a jeweler and have the jeweler test the hardness. Your good fortune.

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