Serpentine The state rock of California, serpentine is a gemrock with wide diversity in color and character, from green to yellow, with browns, black and whites. It can be bicolored, streaked, mottled, banded or spotted and it has a slippery, snakelike surface (hence the name).
View our range of rock polishing machines, grits and spares to buy online. Step by step rock polishing instructions. STEP 1. Open the barrel by pushing either end cap off with your thumbs. When new they are sometimes tight, but if you immerse the barrel in hot water they can be easily removed. Squeezing one side of the barrel assists when opening.