Tamiya Acrylic XF-58 Buff 3/4 oz Paint - Nitro Hobbies
Next up was the base. Looking at pictures, we realized the color of the stone was dependent on lighting. Nathaniel selected Tamiya buff (XF-57) as a good place to start.
Tamiya USA Tam81757 Acrylic Mini Xf57 Buff for sale online | eBay