Volcanic Ash 33
Borax 20
Sand* 16 * (I use the fine grain hobby sand from Michael's or other craft store)
Grolleg 11
EPK 20
____________
100
[dark blue, moss green, brick red, yellow ochre]
For color add...
Dark blue: + Cobalt Carbonate 3%
Moss green: + Chrome 1%
Brick red/warm brown: + Red Iron Oxide 15%
Golden/Yellow Ochre: + Rutile 8%