I am using epoxy resin and hardener in bulk 1 gallon jugs. The kind people use to clear coat table tops with. (Much cheaper than buying the little tubes from hardware stores)
I tape off the face of the stone first. Then I lay (blue painters tape flat on my counter top and do at least 2 layers thick of tape up to my desired height. I then peel the tape off the counter and carefully apply it to the sides of stone.( I don’t apply the tape directly to the stone piece by piece because there will be tiny voids between the tape pieces and the epoxy will seep into them causing the tape not to come off clean. I learned this the hard way.)Repeat this process until I have wrapped the stone adequately. Taking into consideration where the resin will go once I pour it and its weight. Before I pour the epoxy I brace the sides of the tape well I created with something ( I typically use some scrap 2x4 pieces or a brick) pour equally mixed epoxy resin. Leave it alone for 24 hours or so. Carefully remove the tape( sometimes this will be problematic but I have found soaking the stone will help with removal of tape) If the tape will not come off I use a dremel tool with a wire brush to scrub that off ( wear a mask and goggles) any epoxy that does get on the face of the stone can be easily removed with silicone carbide sandpaper or atoma plate or something. I like sic sandpaper because atoma is too expensive to be using for this.
It’s not that big of a deal really. I have once screwed up pretty bad and poured a bunch of epoxy into a stone I prepared and had the bond between the stone and the tape fail ( must’ve happened a hour or so after I poured it because I went to sleep) in the morning I had a huge mess but luckily all the resin mostly just ran out onto som scrap cardboard. The stone was terribly glued to the cardboard on I had to spend a while getting it off with some dremel cutting wheels. Spent another 30 minutes flattening all gunk off of it.
Anyways that what I got