Proc. Roy. Soc. Q’nanp, Vou. xx. Prats IY. 
COLOURS or GEMS 
; LIMPID op COLOURLESS 
a 
ircon (Jargoon ). aie Spinel. Diainond. 
is Tourmaline. Beryl. Quartz i Crystal). 
ae 
Zircon Vacinth), Sapphire (Orental /abax) Garnet 
(Essoniteo- Connemon Stone, Wgbaxdlite « Crossularie), 
Chrysoberyl (Oreeretad Chrysolr/e). Spinel. Topaz. Diamond. 
Olivine (Chrysolite). Tourmaline. Beryl. Quartz (Crtrane o 
Scotch, spanish, Saxon o False [opar). 
| BROWN 
Zircon Vacinth). Saphire (Adamantine Spar). 
Garnet (Essonite o Connamon Otone), Diamond. 
Tourmaline. Quartz (Carmgorm). 
