The series Diamonds Fund of the Russian Federation issued in 2017. The first image is of the Orlov Diamond, which was incrusted into the Imperial Sceptre of the Russian Empress Catherine the Great in 1774.
4 from the set of 5 stamps issued in 1995. I haven't been very active with swapping lately, I have done two rounds (groups in 'round robin') last year. This year's Europa stamps with the birds theme promises to be a swap incentive..!