Featured Turquoise or something else?

Charity Shop silver ring £4, sold as turquoise but I don’t know if it’s more likely to be something else, any ideas please? It’s not glass. It’s not the blue veined turquoise I usually see here in U.K. though I know a lot of it is Howlite and I’m suspicious of a lot of it.

 

A very nice ring, Houseful, and your first vote for turquoise.

 

Second, dito what AJ said!

 

Thank you AJ and Kyra. It will be a nice gift for a friend who wears it, the colour doesn’t suit me at all

 

Given the glassy shine I'm going to be contrary and suggest chalcedony/chysoprase/dyed quartz.

 

That could be my kitchen striplight.
I’ll take a daylight pic, it’s so dull here today, hasn’t stopped raining for 24 hours.

 

Third for well-polished turquoise.

 

Easy to check for agate, quartz or chrysoprase, they are translucent when turquoise is opaque!
Put a light behind and see if it goes through

 

That's a nice price for the ring. Is the mark inside "925"?

 

That’s a good tip! The ring is closed in at the back but I did put a light on the raised stone and it’s opaque.

 

Yes, 925. It’s not often I get a bargain at that particular c shop but once in a while they miss a nice item or underprice.

 

Yes, that's a good point - not all agates are translucent though, but this should be if it's chal/quartz/chryso

 

Persian and Afghan turquoise is that clear unincluded blue.