Two of Leonid Surpin’s DVDs are freely available online! Among so much more.
I’ve posted the links here but they don’t seem to be clickable as a full URL, no idea why. All I can suggest is to piece the following together by copying and then pasting in your browser, and backspacing to remove all of the * characters, or do a search on the website for them.
Leonid Surpin’s Eternity Ring DVD: https://*archive.*org/*details/EternityRing
Leonid Surpin’s Coronet Cluster DVD: https://*archive.*org/*details/CoronetCluster
You’ll have to to investigate the site to grasp the astounding breadth of what is available at https://archive.org/. Books, software, videos, DVDs, magazine back issues like Art Jewelry, and Rock & Gem Magazine, much more.
Look for Advanced Search to help zero in on specifics. If you use the general search box, say for ‘jewelry’ you may also get hits for unrelated things like a Sports Illustrated issue… There is so much here that is jewelry related I can’t begin to describe it, let alone all the rest.
The two Leonid Surpin DVDs came as a great surprise!