The stones for Batch 61 were readied for polish in the QT12 tumbler. They had previously tumbled in F60grit and 220grit so were waiting in the readies drawer for a barrel to come free for 400grit. As I am being more particular about letting stones move on to the next stage there often isn’t enough to fill a load as was the case with these Gemstone Beach stones after Stage 2. These stones were so smooth that I decided to put them through 600grit rather than 400grit. I also added a friend’s super smooth stone to get it ready to take a polish.
When putting this post together I have realised that it’s going to be quite difficult to “track” a load of stones from start to finish if I continue to do more stages in the QT12 tumbler. That’s a 12lb barrel that can tumble over 200 stones in one go! I have decided to stick with using the QT12 for Stage 1 only and to place the stones that are ready to move onto the next stage (Stage 2 – 220grit) into the readies drawer. If the drawer of readies for 220grit gets full then I will use the QT12 to complete Stage 2 so that more can be moved on and be ready for one of my smaller barrels to be free.
Batch 61: Transfered from 12lb Tumbler to 4lb Tumbler 1
Stage 3: 600grit
Number of Stones: 126+1=127
Weight in: 1612+59=1671g
4 Tbspns of 600grit
No Borax
Plastic pellets added
Days Tumbling: 15 (life got in the way!)
Weight out: 1539g – loss of 132g
Pre-polish Soap Tumble: 48 hours (2 Tbspns grated sunlight soap + water)
Stage 4: Polish
Number of Stones: 127
Weight in: 1539g
Polish Mix (2nd use): 9 Tbspns of polish mixed with 600mls of clean water. Plastic Pellets added.
Days Tumbling: 10
Weight out: 1537g – loss of: 2 grams
Final Stage: Borax
48 hour cleaning tumble
2 Tbspns of borax
Plastic Pellets added
Batch 61: Ready for 600grit
Batch 61: Stone Added
Polish Complete
There were so many beauties in this batch! It’s been quite a while since I was really pleased with the shine of a batch of stones. I firmly believe that several factors have made a HUGE difference in the finished product.
Those factors are:
- Inspecting stones with the Headband Magnifier and being very, very particular about what goes through to Stage 2.
- Keep sending stones back to Stage 1 if they have any pits, crevices or bruising.
- Not being afraid to remove a stone permanently from the tumbling process.
- Using the ⅔ barrel full rule – every.single.time! Filling the barrel with water first, then adding the grit.
- Either using 1 Tbspn of grit per pound or the amount of grit per barrel size (eg: 4lb barrel = 4 Tbspns) – I haven’t yet decided which one works best but I am leaning towards grit per barrel size.
- At least 2 – 24 hours of tumbling in soap before the polish tumble.
Polished Stones of Interest: Batch 61
Batch 61 | 12lb Tumbler | Gemstone Beach | 12 March – 6 May (taken from the readies drawer)
4lb Tumbler 1 | 6 May – 4 June 2024
One Reply to “Batch 61: Readied for Polish in the QT12”