For sale are2 ounces 60gm approximately  of USP Grade Menthol Crystals, Mentha arvensis with a purity of 100%.  The crystals have a hexagonal needle like shape.  They dissolve well in water and in some alcohols and oils.

Click on the link to Wikipedia for more detailed information and uses for the Menthol Crystals.

Menthol Crystals - Wikipedia

(Warning - Not for use in or near eye).