a composite crystal form showing an octahedron modified by a pentagonal dodecahedron (also known as a pyritohedron). - 人造寶石 幅插畫檔、美工圖案、卡通及圖標
the orthorhombic (rhombic) system ,(brachydiagonal dome): a similar form but parallel to the shorter horizontal axis (brachy-axis). - 人造寶石 幅插畫檔、美工圖案、卡通及圖標
a "flatter" rhombohedron, showing a more obtuse or compressed vertical orientation. - 人造寶石 幅插畫檔、美工圖案、卡通及圖標
the orthorhombic (rhombic) system ,(macrodiagonal dome / querprisma): a "tent-like" form consisting of two faces parallel to the longer horizontal axis (macro-axis). - 人造寶石 幅插畫檔、美工圖案、卡通及圖標
crystal forms of the tetragonal system ,ditetragonale pyramide: an eight-faced pyramid where each corner of the square base is split into two. - 人造寶石 幅插畫檔、美工圖案、卡通及圖標
a dyakis dodecahedron (diploids), a 24-faced solid within the cubic crystal system. - 人造寶石 幅插畫檔、美工圖案、卡通及圖標
the orthorhombic (rhombic) system ,prisma, brachyprisma u. pyramide: a complex combination crystal showing a primary prism body, side faces of a brachy-prism, and a terminal rhombic pyramid. - 人造寶石 幅插畫檔、美工圖案、卡通及圖標
crystal forms of the tetragonal system ,tetragonale pyramide ,simple four-sided pyramid aligned with the primary axes. - 人造寶石 幅插畫檔、美工圖案、卡通及圖標
the orthorhombic (rhombic) system ,rhombic pyramid ,double pyramid (dipyramid) where the base is a rhombus rather than a square. common in sulfur crystals. - 人造寶石 幅插畫檔、美工圖案、卡通及圖標
spinel twin ,contact twin common in the cubic system. two octahedrons are joined on a common plane. this is so characteristic of the mineral spinel that it is officially known as the "spinel law." - 人造寶石 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) - 人造寶石 幅插畫檔、美工圖案、卡通及圖標岩石
minerals and rocks ,grown crystals (veining grading) of galena and siderite (heudorf, lower saxony, germany) - 人造寶石 幅插畫檔、美工圖案、卡通及圖標紅寶石, 鑽石, 圖畫 - 藝術品
minerals and rocks , stibnite antimonite (arnsberg, north rhine-westphalia, germany) - 人造寶石 幅插畫檔、美工圖案、卡通及圖標礦物質
minerals and rocks ,sulfur, trapped in plaster (weenzen, niedersachsen, germany) - 人造寶石 幅插畫檔、美工圖案、卡通及圖標圖畫 - 藝術品, 岩石, 花崗岩
