Ключевые слова: agate, agate of gobi, appreciation, art collection, artwork, boutique, china, cold tempering, cooling, formation, frogs of stone carving, geological, geomorphic change, heat, hebei province, mineral, natural, precious, product, rare, rough, shijiazhuang city, stone carving, stones, the art of seed material, treasures, undersea, volcano eruption, weathered rain and snow,