その不可思議な「石の風景」で、古代から人々を深く魅了してきた瑪瑙やジャスパー。ほかにも、サンダーエッグ、セプタリア(亀甲石)、孔雀石、オパール、菱マンガン鉱、風景石、瑪瑙化した木や恐竜の化石、隕石など、著者秘蔵の名品約380点が見せる美麗な模様の世界。単行本として好評を博した驚異のオールカラー石図鑑をアプリ化。鉱石や貴石ファン、パワーストーン愛好者、デザイナー、あらゆる石好き、不思議好きに捧げる！

The world of stone formations introduced in this book app focuses mostly on silica-based stones such as agate and jasper. All most 380 illustrations consist mainly of cut surfaces of stones to show what colors and forms are created in a stone as a result of various minerals having been mixed and compressed together. The world of stone formation is filled with surprises surpassing our imagination. In that world, we can find condensed versions of nature's various forms. It is the author's hope that this book app will fill in the gaps between typical illustrated books of stones and minerals and illustrated books on stone appreciation.