hihi,

How many types of lapis sand are there in the market?

most lapis sand LFS selling r those white/black/brown/grey gravels, which overall looks brownish when used.....

I went to SAM aquarium, they use another kind of lapis which overall looks more white (or rather pearly white, not pure white) than brown and the gravel looks pretty smooth rounded, different from normal taht looks rough edges... I wonder what kind of lapis is that.