Grell Crystal
A dingy, translucent, dishwater grey in color, grell crystal is a common building material in grell lairs. It is used to fashion light walls, shelves, partitions, and utensils.
	In its unset form, grell crystal is a dry powder made of small, silver-grey crystals that look like rough, dirty salt. When dropped into water, the crystals expand and harden into flat sheets. One pound of crystal powder and 5 gallons of water create a 25-square-foot sheet that is 1 inch thick and weighs 50 pounds. It takes about 1 hour for the sheet to grow to full size. While it is growing, it can be pruned or shaped into specific forms with a little careful manipulation. Grell that work with crystal take ranks in Craft (crystalwork) to make items.
	When set, grell crystal has hardness 7, 20 hit points per inch of thickness, a break DC of 20, and a Climb DC of 25. Grell layer the crystal several inches thick when particularly strong structures are needed.
	Grell Alchemy and Craft (alchemy), Craft DC 20; Price 10 gp; Weight 1 lb (unset).