Colorado moss grass necklace silver charm

I purchased this charm at a boutique in Colorado. They said it was moss from the Rocky Mountains. I do not know if the charm actually contains moss or grass from the mountains or if simply is a pattern to evoke moss or grass. I am selling this cheaply since I do not know it’s materials. Pattern apparent on front and back as shown. Front of charm is slightly curved, back is flat. Charm is about 1” long as shown. The charm came with no chain. I am including an about 23.5” chain, with spring ring clasp, materials unknown.