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Charoite Chatoyant Rare Purple Russian Stone by FenderMinerals,
Boytroidal Chalcedony. Botryoidal (grape-like) structures manifest internally as "turtle-backing" or sometimes externally as "bubble-top" surfaces.
Sardonyx: The stone of senses. It improves sensory perception & strengthens the parasympathetic nervous system. Helps prevent bronchitis & infections of the respiratory tract. It sharpens the mind. Helps the wearer confront the world with open eyes & not get lost in dreams. It encourages the sense of reality in Capricorns & also helps Aries to distinguish what is essential.