1690. October.—The Aqua-Marine, or Opal, signifies distress and hope.
1691. November.—The Topaz signifies fidelity and friendship.
1692. December.—The Turquoise is the stone which expresses great sureness and prosperity in love, and in all the circumstances of life.
STAINING.
1693. General Observations.—When alabaster, marble, and other stones, are colored, and the stain is required to be deep, it should be poured on boiling-hot, and brushed equally over every part if made with water; if with spirit, it should be applied cold, otherwise the evaporation, being too rapid, would leave the coloring matter on the surface, without any, or very little, being able to penetrate.