How much grit do you put in a rock tumbler?
STEP 1 - Coarse Grind. The first step of the four-step tumbling process is to run the rocks in the tumbler with coarse grit. You begin with a barrel that is about 2/3 to 3/4 full of tumbling rough, then add two level tablespoons of coarse grit (we use 60/90 grit silicon carbide) for each pound of rock.
Because grit gradually breaks down as you're tumbling, you cannot reuse it. However, the slurry that your tumbler creates can be used from the previous stage to help the grinding action. For the polish stage, you do not want any slurry or grit in the barrel from your prior stage.
- Amethyst can be safely cleaned with warm soapy water. Ultrasonic cleaners are usually safe except in the rare instances where a stone is dyed or treated by fracture filling. Steam cleaning is not recommended, and amethyst should not be subjected to heat.
- For one, cold water "shrinks" your fingers, making it that much easier for an already loose engagement ring to disappear during a swim. The ocean should be off-limits for engagement rings. Chlorine can damage and discolor the mounting of your ring and your platinum, gold, or white-gold wedding band.
- This frees up the extra space and the diamond might move, or fall out. Fortunately, when this happens in an ultrasonic cleaner, the diamond is easily found. As a ring gets knocked or bumped, metal may be worn away or become loose and a diamond may move in its setting.
Updated: 4th November 2019