機器
antwerp
asset
attestation
carat
certification
certify
clamped
commodity
crystal
cutting
diamond
diamond cutters
diamond cutting
diamond dealer
diamond trade
dob
flawless
gem
gemstone
goldsmith
goldsmiths
handcraft
internally flawless
investment
jeweler
luxury
mine
mineral resources
mining
octahedral
octahedron
precious
raw
raw material
real value
rich
rough
traditional
treasure
uncut
unpolished
vintage
wealth