Metal Facts & Fiction:
Zinc: Also known as pot metal, spelter, white metal, and even "french bronze". Soft, does not take detail well. Brittle, not malleable; breaks if bent. Easy to cast. Cast zinc pieces are usually hollow. Weighs 4.16 ounces per cubic inch.
Brass: An alloy of copper and zinc, usually 50% copper, 50% zinc. Somewhat malleable; bends some without breaking. Intermediate hardness, takes detail moderately well. Moderately easy to cast. Weighs 4.94 ounces per cubic inch.
Bronze: An alloy of copper and tin. Without any applied patina, it is the same color as some brass. Hard, takes detail very well. Brittle, not malleable; breaks if bent. Difficult to cast. Weighs 4.71 ounces per cubic inch. Lesser grades of bronze can also have some zinc in the alloy, resulting in properties closer to brass.
It's very heavy, it must be bronze. False. The specific gravities (ounces per cubic inch) of these metals are too close to distinguish by heft.
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