QUESTION: "I have a 6 yr old grandson who has odd a form of autism, and sensory deprivation disorder. Is there crystals that he can either carry with him to help him?"
MY ANSWER: For autism spectrum disorders the most often used crystals are sugilite and moldavite . Sugilite is said to help ground the individual in current reality, and moldavite to assist those who find it difficult to be and stay on Earth. Gold and charoite are also recommended by many crystal healers.
From what I understand about sensory deprivation or sensory integration disorder, crystals that work with the brain and nervous system might be very helpful in processing contradictory or unbalanced sensory information.
Crystals for the brain would include albite, amber, aragonite, cerrusite, chalcopyrite, clear quartz, galaxite, garnet, gehlenite, hematite, heubnerite, rhodizite, seraphinite (serafina), strombolite, tanzan aura. Crystals for the nervous system could include alexandrite, amazonite, aquamarine, apatite, botswana agate, fire agate, emerald, galena, lapis lazuli, morganite, peridot, sugilite, tourmaline. In both cases though sugilite as a healer's stone, enhancing healing of all kinds, could also be used.
Also, stones for particular symptoms can be used. For instance, if calm and balance are issues, lepidolite or hematite could be helpful for him to stay centered..
Whichever crystals you choose, be sure that you find a way for him to use them safely, taking his abilities into careful consideration.