GEMSTONES!

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Across
  1. 4. This stone is a blue gem with black coloured "veins" called matrix
  2. 5. This stone is a hardened sap from prehistoric pine trees
  3. 6. This stone is red and was believed to have special powers by the Greeks
Down
  1. 1. This stone can be any shade of blue from pale blue to blue-green
  2. 2. This stone can be different colours from pink,green,purple,yellow or clear
  3. 3. This stone is a white gem that is created inside of a mollusk, or oyster