George-this is from Wikipedia
Crown ornamentation
The Chrysler Building is also renowned and recognized for its terraced crown. Composed of seven radiating terraced arches, Van Alen’s design of the crown is a cruciform groin vault constructed into seven concentric members with transitioning setbacks, mounted up one behind another.[39] The stainless-steel cladding is ribbed and riveted in a radiating sunburst pattern with many triangular vaulted windows, transitioning into smaller segments of the seven narrow setbacks of the facade of the terraced crown. The entire crown is clad with silvery “Enduro KA-2” metal, an austenitic stainless steel developed in Germany by Krupp and marketed under the trade name “Nirosta” (a German acronym for nichtrostender Stahl, meaning “non-rusting steel”).[11][40]
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behind my LENS 
I like the tones here. It looks like mother of pearl. What is the “skin” on this building?
George-this is from Wikipedia
Crown ornamentation
The Chrysler Building is also renowned and recognized for its terraced crown. Composed of seven radiating terraced arches, Van Alen’s design of the crown is a cruciform groin vault constructed into seven concentric members with transitioning setbacks, mounted up one behind another.[39] The stainless-steel cladding is ribbed and riveted in a radiating sunburst pattern with many triangular vaulted windows, transitioning into smaller segments of the seven narrow setbacks of the facade of the terraced crown. The entire crown is clad with silvery “Enduro KA-2” metal, an austenitic stainless steel developed in Germany by Krupp and marketed under the trade name “Nirosta” (a German acronym for nichtrostender Stahl, meaning “non-rusting steel”).[11][40]
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