A great thick worry coin, gift, or reminder coin. This coin of Mars was created using areographical data from NASA and is areographically correct at 1:214,195,583.59 scale to Mars. Struck in 31.5g of solid copper Expert patina to highlight the engraving 1.25" (3.17 cm) diameter 3/16" (6mm) thick Packaging comes with a description of the coin and Mars Facts! Mars has been known since ancient times because it is visible to the naked eye. The red planet has captivated our curiosity and become a focal point of space exploration as we seek to answer questions about our solar system. This beautiful coin has been a dream of ours since 2018, and with perseverance, we have finally completed the endeavor! Designed and engraved by Ben Meehan and Woody Maringer. Shire Post Mint. All rights reserved.