Amethyst

And the third row a ligure, an agate, and an amethyst.

And the third row, a ligure, an agate, and an amethyst.

The fifth, sardonyx; the sixth, sardius; the seventh, chrysolite; the eighth, beryl; the ninth, a topaz; the tenth, a chrysoprasus; the eleventh, a jacinth; the twelfth, an amethyst.