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Lapis polishing

G’day; I find that after one has ground the piece with the
usual diminishing grit sizes of papers fastened to a soft backed
wheel at about 500 - 800rpm, and got a pre-polish with 600grit
paper, a leather-faced wheel painted with a thin slurry of (old
fashioned) tin oxide and water will give a brilliant polish to
anything I’ve tackled from lapis to nephrite jade to paua
(abalone shell) to rhodonite to agate to… You have to press
very hard whilst keeping the piece moving and presently one feels
a kind of drag - and that’s when you get the beginning of a real
polish. Enjoy - and cheers,

   / /    John Burgess, 
  / /
 / //\    @John_Burgess2
/ / \ \

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