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Across
  1. 3. What stone can be any shape of blue from pole blue to blue green?
  2. 4. What can be a variety of different colours from pink, green, purple, or clear?
  3. 5. What is a white gem that is created inside a molusk?
Down
  1. 1. What is blue stone with black coloured veins?
  2. 2. What is a hardened sap from prehistoric pine trees?
  3. 6. What is red and was believed to have special powers by the Greeks?