Types Of Rock & StoneThe Grass Store offers a great selection of quality landscape rocks and stones to help beautify your landscape in the Conroe, Montgomery and Willis Tx. areas.Moss RockMoss Rock is naturally sourced sandstone from the Texas Hill Country.Learn More →Moss Rock BouldersFrom the Texas Hill Country - boulders will have moss with a weathered patina.Learn More →Mexican Beach PebblesFormed from volcanic beach river rocks from Baja, Mexico.Learn More →Oklahoma FlagstoneOklahoma Flagstone is a highly durable, strong and one of the highest hardness stones you can purchase.Learn More →