Everything Mycology › Vermiculite Quarts Image 1 of 3 Image 2 of 3 Image 3 of 3 Vermiculite Quarts $2.50 Super fine vermiculite by the quart. DM to source bulk by the pound or 24lb bag. Quantity: Add To Cart Added! Super fine vermiculite by the quart. DM to source bulk by the pound or 24lb bag.