This is a multifaceted sculptural montage that comprises different interesting & rare materials.
The skeletons are hand carved from single pieces of the best quality white mammoth ivory(Siberian source) which is stable and crack free. This is very hard to obtain as the demand is high around the globe.
The bombs are cut from Siberian jet inlaid with 3 different turquoises, all natural and hand cut. Jewish star is Carico Lake turquoise from the Crescent Valley, Nevada. Christian cross is Kingman. Muslim moon star is mixed color of Fox turquoise from Northern Nevada.
Fuses on the bombs are from twisted silver with sapphires set in gold.
The base support is antique ironwood fromthe frame of a demolished warehouse in Kalimantan, Indonesia, ...note that this wood will over time revert to it's natural oxidized color, which is dark brown to black. The base supports on each ebd are again, Siberian jet( a hard form of fossil anthtacite, or coal) that have been textured and carved with a flourish around inset discs of Australian Chrysoprase, pegged in with colored sapphires set in gold.
The .50 caliber machine gun shells were found by fossil diggers in the clay cliffs of WWII gunnery range in Kansas. The patina has been left intact and the slugs are fashioned out of Tri-color layered metals called Mikume gane(wood grained metal, in Japanese). They are bronze, nickle & copper.
To top it off, the hats are made from 3 materials as well: left to right-water buffalo horn, fossil bone of the Stellar sea cow(extinct) and Siberian jet for the turbin.