It could be 875 which is 21K and is usually found in gold from the Middle East. Gold markings are 333 8K, 375 9K, 417 10K , 500 12K , 585 14K, 750 18K, 875 21K, 900 21.5K, 917 22K, and of course 999 24K. British jewelry is usually the 8 or 9KT, 18K usually Italian, 21K Middle East Gold, 21K Arab Gold, 22K Indian Gold and gold coins, 24K is in Chinese Jewelry and coins. Maybe it is 875.Â
I need a better photo of the stone, but it doesnt look like Turquoise, .Also 825 could be  Silver...most are 800.or 925. . (look closer it could be 925)
So ALWAYS have the metal tested. no matter what...Â
Good Luck..I can not give you a worth price, without  100%  knowing what it is, Good Luck
Re: ring
It could be 875 which is 21K and is usually found in gold from the Middle East. Gold markings are 333 8K, 375 9K, 417 10K , 500 12K , 585 14K, 750 18K, 875 21K, 900 21.5K, 917 22K, and of course 999 24K. British jewelry is usually the 8 or 9KT, 18K usually Italian, 21K Middle East Gold, 21K Arab Gold, 22K Indian Gold and gold coins, 24K is in Chinese Jewelry and coins. Maybe it is 875.Â
I need a better photo of the stone, but it doesnt look like Turquoise, .Also 825 could be  Silver...most are 800.or 925. . (look closer it could be 925)
So ALWAYS have the metal tested. no matter what...Â
Good Luck..I can not give you a worth price, without  100%  knowing what it is, Good Luck