the world > the earth > minerals > types of mineral > [noun] > white lamellar mineral
spar1581
spaad1594
spar-stone1694
spat1706
sugar-spar1730
spath1763
chesil spar1835
1730 Philos. Trans. 1729–30 (Royal Soc.) 36 31 Those which they call Sugar-spars, are those whose Crystallisations are very small, and so on crumbling to Pieces have the Appearance of powdered Sugar.