Colored pebbles sized at 4–5mm are highly versatile, fine-grained materials typically used for aquarium substrate, succulent or bonsai top-dressing, and indoor hydroponic decoration. At this miniature size, they span a few distinct product categories depending on your intended project.

Natural Tumbled Stone & Gravel (4–6mm): Perfect for aquariums, terrariums, and heavy pot toppings. These include fine-polished natural quartz, river gravel, or dyed stone aggregates that won't blow away or degrade over time