Aquarium Decoration. Color is Grey. 5 1/2inches tall, 7 1/2long, 4 1/2wide.

This is one of my favorite saved pieces from when I had fish tanks. Its from The Back Bay, an inlet from the ocean. It was aquired 40 years ago. Keeping it simple, I will just call it volcanic rock slag that had air bubbles. Its the impeccable rock for invertibrates, shrimp hotel. A really fantastic addition to any larger tank and has multiple flat sides to view it from any angle. There are still some left over shell pieces from former inhabitants. Its clean but you should always re-soak, rinse any new pieces. Going to price this fair, considering shipping charges. If you find one as nice and as big as mine for cheaper(i would have to see image) I will match the price. Time for someone else to enjoy this piece. Thanks for looking. Perfect for everyday use. top-grade materials and excellent craftsmanship ensure long-lasting durability.