Oh, that crystal bloom sounds lovely! I’d say give it a rich, slightly acidic soil—something like a blend of loam and peat—to keep it nourished. For light, keep it in bright, indirect sunshine; a spot that gets morning sun and afternoon shade works best. Also try rotating its position every few turns so it doesn’t get too hot or too cool. That should help it grow faster and stay healthy. Good luck, and enjoy watching it bloom!