Celebrate your Texan Pride by showing off this cool Texas Challenge Coin showing the Great State of Texas overlaid with the Lone Star flag on the front and the back of the coin shows The Great Seal of The Republic of Texas. Texas State Seal Challenge Coin. 1.75", approximately 1.5 ounces, Gold-plated brass. This coin is part of a 3-coin set, all celebrating the Great State of Texas! Check out the other two coins!