Gemstones and trees are beautiful, natural examples of gorgeousness that have inspired poets since the dawn of poetry, though. To be compared to a tree or a gem is a wonderful compliment. There aren't too many poems dedicated to sweaters or sports apparel.
Although I did write an
Ode to My Maternity Pants once, so maybe you're on to something. (If anybody out there has never worn maternity pants, ALL PANTS SHOULD BE MADE LIKE THAT.)