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document updated 10 days ago, on Nov 17, 2025
diamond drilling
/user/DemandNo3158
his own post —
https://www.reddit.com/r/Lapidary/comments/16eoksm/drilling_stone/
https://www.reddit.com/r/Lapidary/comments/174oi23/comment/k4ak70e/
https://www.youtube.com/results?search_query=drilling+gemstone