Google "ring is made from silver" & it returns 53000 results.
Google "ring is made of silver" & it returns 226000 results.
This site says "We often use made from when we talk about how something is manufactured" & "We use made of when we talk about the basic material or qualities of something. It has a meaning similar to ‘composed of’".
So, if we say "This ring is made from silver", we want to emphasize how it is manufactured but if we say "This ring is made of silver", we want to emphasize the basic material of it.
So, "This ring is made of silver" & "This ring is made from silver" are both correct but have different meanings, right?