The clock is made of epoxy resin. The movement of the clock mechanism is continuous and silent. The use of pigments and mica powders for coloring and hand processing make the result of the product unique for each clock and different from the others that I make with the exact same products. Geode round frame with a diameter of 10", thickness is 1/2". Materials used: liquid pigments, mica powders, glass pieces in geode clocks, two-component resin from non-toxic casting, clock movement parts. To hang your clock simply hang it from an existing picture hook or a nail. The clock needs AA batteries (not included in the order). Having your clock in direct sunlight will cause the colors to fade over time. Do not hang your clock outdoors in heat as it will cause the resin to soften and begin to bend. In order not to scratch the resin, it is necessary to clean the object with a soft cloth moistened with water or with a neutral PH detergent and in no case rub with aggressive chemicals. All attempts have been made to photograph these items correctly in the natural light. However, colors can/do vary with everyone's individual monitors.