The Echidna The Spiked Horror 33 Gram Copper Colorized Coin in card is a unique and collectible item minted by Cool2coin in the United States. This uncirculated coin is made of copper with a fineness of 0.999 and features a scary design of an echidna with spikes, adding a touch of horror to any collection. The coin comes in a protective card and is sure to appeal to collectors who appreciate rare and unconventional pieces.