🔎 UNIDENTIFIED Natural tumbled topaz???

[Fodegrass]

It is translucent and looks like natural tumbled topaz. Any idea?

 

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[Fodegrass]

Photos

 

[opalboy]

Smack it with a hammer, topaz has perfect cleavage (👍) it would have a very flat surface.
Then post picture of cleavage.

 

[Fodegrass]

But that will destroy it. I want it in one piece. Any other bright ideas?

 

[Blackfoot58]

From what I see, it looks like a light-colored chalcedony. Here’s a photo for comparison. Possibly even beach-worn crystal. In what general area was it found?

 

[Fodegrass]

From what I see, it looks like a light-colored chalcedony. Here’s a photo for comparison. Possibly even beach-worn crystal. In what general area was it found?View attachment 2161311

I found it in the Declan plateau of South india (tamilnadu state).

 

[Red-Coat]

How is this solved?

There is no single definitive test without resorting to sophisticated equipment, but I would recommend investing in a UV flashlight which will be useful for other purposes too. I bought one a while ago for the US equivalent of about $20. They usually operate in the short wave UVA band (~365nm), which is more useful than the long wave band (~395nm).

Topaz will fluoresce a golden yellow colour under short wave UV (and a pale creamy yellow under long wave UV).

You could also try a scratch test. Topaz is very hard. At least 8 on the Mohs scale versus quartz at around 7 to 7.5.

The crystal structure means it takes a very high polish. If your specimen has been extensively tumbled, it may have a slippery or soapy feel (quartz will not).

Topaz exhibits ‘pleochroism’. With strong ordinary lighting it shows different colours or depths of colour when viewed from different angles (yellow, reddish, pink, violet or bluish). It may not be very pronounced in thick specimens.

 

[Fodegrass]

How is this solved?

There is no single definitive test without resorting to sophisticated equipment, but I would recommend investing in a UV flashlight which will be useful for other purposes too. I bought one a while ago for the US equivalent of about $20. They usually operate in the short wave UVA band (~365nm), which is more useful than the long wave band (~395nm).

Topaz will fluoresce a golden yellow colour under short wave UV (and a pale creamy yellow under long wave UV).

You could also try a scratch test. Topaz is very hard. At least 8 on the Mohs scale versus quartz at around 7 to 7.5.

The crystal structure means it takes a very high polish. If your specimen has been extensively tumbled, it may have a slippery or soapy feel (quartz will not).

Topaz exhibits ‘pleochroism’. With strong ordinary lighting it shows different colours or depths of colour when viewed from different angles (yellow, reddish, pink, violet or bluish). It may not be very pronounced in thick specimens.

Yeah. It is not topaz, somehow by mistake I pressed the solved check box.
But it seems like it is chalcedony as said by Blackfoot58 since his prediction matches since I found it in Deccan plateau of south india

 

[Treasure_Hunter]

I removed the solved for you....

 

[Fodegrass]

I removed the solved for you....

Thank you. Today I found a couple of more same stones on a river bank in south india tamilnadu madurai.

 

[Fodegrass]

Here is a broken stone