gemology, blue topaz, semi-precious gemstone renowned for its stunning icy-to-deep blue hues and excellent durability, vintage illustration - 黃玉 幅插畫檔、美工圖案、卡通及圖標
minerals and rocks ,spherulitic structure in grainy stone of a ball diorite, semi-polished (corsica, france) - 黃玉 幅插畫檔、美工圖案、卡通及圖標熔岩
minerals and rocks ,semi-polished structure of porphyrite (jabal ad dukhan, bahrain) - 黃玉 幅插畫檔、美工圖案、卡通及圖標
minerals and rocks ,almond stone structure of melaphyre (ilfeld, thuringia, germany) - 黃玉 幅插畫檔、美工圖案、卡通及圖標
minerals and rocks ,spherulitic structure in glassy stone of a obsidian, semi-polished (lipari, sicily, italy) - 黃玉 幅插畫檔、美工圖案、卡通及圖標岩石