Brown garnet (hessonite or cinnamon stone), sometimes wrongly called hyacinth in the trade, is of a deep reddish-brown color.
The cinnamon stone is a crystal of a rich yellowish-brown tint, but little prized in Ceylon.
It is deep in shade, less red than cinnamon stone, and with marked dichroism, which both brown diamond and brown garnet lack.
Certain stones, notably the peridot (or chrysolite) and the hessonite (or cinnamon stone), have an oily luster.
Hessonite garnet, the cinnamon stone or "hyacinth" (incorrect) of the trade, comes mainly from Ceylon.
If calcium be united with these two the variety of garnet known as grossularite, or essonite, or cinnamon stone, is produced.