Decorative Stones and Rocks in Jars Mosser Lee offers several unique decorative rocks and stones in reusable plastic jars. Design a beautiful setting with Mosser Lee's Decorative Stones and Rocks in Jars. Discover your own creativity with these decorative products. Each jar weighs 5lbs. Most of these products are only available in jars. Use for terrariums, dish gardens, vase filler, fairy gardens and scores of decorative gardening projects.