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