Guess the object...

Here's the composition of an object...

Oxygen (65%)

Carbon (18%)

Hydrogen (10%)

Nitrogen (3%)

Calcium (1.5%)

Phosphorus (1.0%)

Potassium (0.35%)

Sulfur (0.25%)

Sodium (0.15%)

Magnesium (0.05%)

Copper, Zinc, Selenium, Molybdenum, Fluorine, Chlorine, Iodine, Manganese, Cobalt, Iron (0.70%)

Lithium, Strontium, Aluminum, Silicon, Lead, Vanadium, Arsenic, Bromine (trace amounts)

Can you guess what this object is?

Clue: it's really complex...