Precious stones are those which, because of their beauty, hardness, and rarity, are prized for use in ornamentation, especially in jewelry. The diamond, ruby, sapphire, and emerald are the only stones which are, strictly speaking, entitled to be called "precious" in this sense; but the opal, on account of its beauty, is often classed with the precious stones, as is also the pearl, which is really not a stone, but a secretion of a shellfish.
Bloodstone or Heliotrope
Lapis-lazuli or Lazuli
Rock Crystal or Mountain Crystal
From The Standard Dictionary of Facts, The Frontier Press Company, Buffalo, N.Y., 1923.
“When you pass through the waters, I will be with you; and when you pass through the rivers, they will not sweep over you. When you walk through the fire, you will not be burned; the flames will not set you ablaze.”
– Isaiah 43:2