Yellow Cat Petrified WoodPolished This Yellow Cat Petrified Wood comes from Grand County, Utah found in the Brushy Basin Member in the Morrison Formation. This petrified wood is about 140 million years old from the Jurassic Time Period. Yellow Cat Petrified Wood is extremely rare and highly prized by wood and rare specimen collectors alike. Mose of the pieces we have tested under the Ultra Violet light have fluoresced a very bright, lime green. The limb casts... from this area can be solid banded agate all the way through, banded agate with calcite or quartz centers but the majority are partial replacements with the banded agate mixed with shale to complete the casts. The agate colors range from red, orange, black, yellow and lavender. Measurements on wood are about 3/4 inch diameter on the polished face and 3/4 inch tall.The Utah wood measures about 3/4 inch diameter and 3/4 inch tall. Thank you for looking at our auction today. The rock you receive always look so much nicer than the pictures. Please email with any questions you may have. Check out our store: Petrified Palace for more great rocks! Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.