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I'm Not Crazy, I'm Just a Little Bit Quartz T-Shirt for Mineral Collectors humorist Perfect for engineers who turnCelebrate your love for crystals with this fun "I'm Not Crazy, I'm Just a Little Bit Quartz" T Shirt. Perfect for mineral collectors and crystal enthusiasts who enjoy a touch of geology humor in their wardrobe. The 100% cotton unisex classic tee will help you land a more structured look. It sits nicely, maintains sharp lines around the edges, and goes perfectly with layered streetwear outfits. Plus, it's extra trendy now! 100% cotton Sport Grey is 90%