Mother of pearl (mop) shell
Dolomite and limestone
Sea sand, iron ore fines
Limestone, calcium carbonate
Crude sand and clay
Artificial marble, engineered marble, quartz stone, natural marble, travertine, onyx, limestone, sandstones
Quicklime
Fresh water natural loose pearl, pearl
Sandstones and silica sand
Natural ruby
Precipitated silica, silica sand
Sandstones and silica sand
Ruby rough and sapphire corundum