Blastoise is known as the Shellfish Pokémon, it is a Water-type Pokémon introduced in Generation 1. It is the final evolution of the PokémonSquirtle.
 
About Blue Aventurine:
 
Prosperity – Heals – Inner growth 
 
Blue Aventurine is a stone of communication and self disicipline. It is said to help those with addictions by helping them take responsibility for their problems. Blue Aventurine clears old, stagnant energies, helping you to open up to inner growth and spiritual work. It also strengthens communication abilities, helping you to speak out when required and being true to yourself.
 
Chakra: Throat.