The tidal range is the vertical difference between the high tide and the succeeding low tide. Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of the Earth.
Coin toning can intrinsically increase or decrease the value of coins. Natural coin toning can be quite beautiful. It can also be outrageously ugly. And because beauty is often times in the eye of the beholder, placing a value on a coin due to its toning can present problems.
Proof Sets are the ultimate standard in coins. GovMint.com has the most dazzling and gleaming U.S. Coins with details so sharp and luster so brilliant that they are instantly recognizable as the peak of coin perfection. Collectors scramble to get these coins complete with original U.S. Mint packaging and unparalleled craftsmanship. Typically, these sets feature stunning presentation, from the brilliance of the coin to the care in which they are packaged and displayed.