This bronze anatomical heart necklace with gold fill chain features lifelike details - from the four chambers to the arteries and veins. The size of your fist one of your most vital organs, your heart beats 72 times a minute; 100,000 times a day; 3,600,000 times a year; and 2.5 billion times during your lifetime. Treat it well and your heart will create enough energy to take you to the moon and back. Comes on a simple gold fill 18" cable chain with spring ring clasp. The bronze heart charm measures 18x11mm, excluding jumprings. Our bronze is a high quality Italian alloy of copper and tin that contains an anti-tarnish compound which delays but does not eliminate eventual oxidation.