Here are some really nice tumble stones that come in various sizes.
Tumbled Crystals for Beginners Gift Set - Two Size Options
Amazon.com: FORBY 3lb Natural Bulk Assorted Tumbled Polished Stones Crystal Set Quartz Stone Kit Real Raw Stones for Home Decoration Reiki Gifts Energy Therapy Beginners-Stone Size 15 MM : Home & Kitchen
Sage Goddess Tumbled Lepidolite: Small for calm and wellness
Collection of various tumbled gemstones with names isolated on white background. | CanStock
Information Chart of Tumbled Stones (Version 1) – Nature's Treasures
Rhodolite Garnet in Quartz & Schist Natural Tumbled Stone - One Stone – Crystal Gemstone Shop
Natural South African Tumbled Stone Mix, AAA Grade | Burton's – Burton's Gems and Opals
Amazon.com: Crocon 1LB Assorted Crystals Tumbled Stones Bulk Set 2000+ Carats Pocket Crystal Healing Balancing Gemstones Tumbled Collection Palm Stone Good Luck Charm Gift Craft Home Decor Size: 20-25 mm : Home
Tumbled Smoky Quartz - Smoky Quartz Tumbled Stone | New Moon Beginnings
2 Lb Large Mixed Tumbled Stones VIBRANT COLOR reiki - Etsy
Assorted Mix Tumbled Stones: SMALL MEDIUM or LARGE Sizes - Etsy