Dragon Stone, also known as Ohko Stone, is a popular aquascaping rock named after it's scale like texture. The natural details and crevices gives your aquascape an aged look that can't be duplicated with artificial decorations. The clay-like composition of this type of stone makes it brittle compared to other rocks, allowing larger rocks to easily be broken down with chisel and hammer.Dragon Stone is inert and will not influence your water chemistry, making it the ideal layout material for any aquarium.If you are looking for larger stones, a minimum weight may be required. Larger stones = higher weight. Email our team if you need assistance.Stones require rinsing prior to use.Stone coloration darkens when wet.Some stones may alter water chemistry. Please do thorough research to ensure this stone is suitable for your setup. Small size 2" to 5" Medium size 5" to 8"  Large size 8" to 12" Extra Large 13" to 16". Oversized 16" and Up ($20 oversize shipping applied)