This listing is for a trilobite from the Marble Mountains in San Bernardino County, California (Latham Shale, Lower Cambrian). It is a bristolia, probably b. bristolensis, that came from the collection of an accomplished fossil collector who spent decades collecting throughout California. It is roughly 518 million years old! Like all other trilobites, this species went extinct millions of years ago so all that remains of them are fossils such as this. The matrix weighs a lit...tle under one ounce and measures about 1.5 inches long by 1.5 inches wide (0.43 inches thick at thickest part). Please have a look at the pictures posted for this listing. They are unedited and do a great job of showing what the fossil looks like. The fossil will ship within one business day of payment being received. I ship with tracking to anywhere in the United States via USPS First Class Mail. I also ship internationally through eBay's Global Shipping Program. Domestic returns will be accepted as long as it is received back in original condition. Buyer only has 30 days after receiving the fossil to return it to Seller. Buyer is responsible for shipping costs. I am open to combining shipments, contact me or request an invoice if you are interested.