Check the listing for details. Fine Light Gray Limestone Modelling Rocks 0-3mm | Wargame & Basing Material. Color: Light Grey, Condition: New. Listed at 14.99 USD. The basing materials can then be painted if required, so that they blend in with your terrain. Create that ultra-realistic base for your model miniatures or add a rugged landscape to your layouts with basing materials from sands and stones, to forest ground cover and cork rubble.