We have been working on some Apaches Tears Obsidian for months now. It has been quite the challenge figuring out what does, and doesn't work.
The recipe that we used for the Labradorite is this:
Stage 1 - In the Koolstone tumbler. Barrel is about 3/4 full. 3 tbsp 60/90 SiC grit, 1 tbsp Borax, 1 tsp Old Miser. Water to just below the top of the rocks. Check every week and pull what is ready to move to stage 2 (rinse well), load more rough to maintain level of rocks.
Stage 2 - Harbor Freight (HF) Tumbler. Barrel around 2/3 full. Rock to ceramic meadia mixture is about 30% ceramic media. 2 tbsp 120/220 SiC grit, 1 tbsp Borax, water level is slightly below top of rocks. Run for 14 days. Rinse well.
Stage 3 - Add more media if needed to maintain 2/3 full. Burnish. Cover rocks and media completely with water, 1 tbsp Borax and 1 drop of Dawn dish soap. Run for 1 day. Rinse well.
Stage 4 - HF Tumbler. Add media if needed to maintain 2/3 full. 2 tbsp 500 AO grit, 1 tbsp Borax, water to just below top of rocks. Run for 10 days. Rinse well.
Stage 5 - HF tumbler. 2 tbsp 1000 AO grit, 1 tbsp Borax, water to just below top of rocks. Run for 10 days. Rinse well.
Stage 6 - HF tumbler. 2 tbsp 8000 AO grit, 1 tbsp Borax, water to just below top of rocks. Run for 10 days. Rinse well.
Stage 7 - HF tumbler. Burnish. Cover rocks and media completely with water, 1 tbsp Borax, 1 drop Dawn dish soap. Run for 1 day. Rinse well.
That is it.
By the way, how do you like the Koolstone tumblers?
Your labradorite looks great! I'm attempting to tumble some as we speak. Love to know your recipe.
I finally found an obsidian recipe that works like a charm and my oh my is the Meeko's silver sheen obsidian gorgeous when it polishes up!