TBC BLACK Rocks: Beautiful Unique Large Polished Black River Rocks. Most Rocks Over 1.5 Inches in Length. Use in Floral Arrangements, Table Scatters, Vase Fillers, Great in Fireplace, Candle Arrangements, Aquariums, Wet or Dry. Great for Eye Catching Centerpiece. Perfect for Indoor or Outdoor Gardening, Containers, Fountains & Spas. This Large Bag Contains Approximately 2 Pounds of Polished Stones.