"Alaska black diamonds" is the trade name of a mineralized form of iron oxide known as hematite. Hematite occurs around the world, and the milled gemstones created from it hold a lustrous black finish. Hematite has been called bloodstone because it can be ground into a dark red powder that the ancients believed to be coagulated blood, hence its use as an amulet for pre-scientific medical applications.Know More
Hematite powder's association with dried blood is not totally unwarranted. The red powder it degrades into is, in fact, rich with oxidized iron. Iron oxide is what gives red blood cells their characteristic color, and the compound, known commonly as rust, is also prevalent in the surface soils of Mars.
Hematite is common on Earth, and it is the main form in which iron is mined from the crust. The mineral was laid down globally in huge deposits known as banded iron formations mostly between 1.8 and 2.4 billion years ago as oxygen proliferated in the atmosphere. Free iron is unstable in the presence of oxygen, and the loose iron in Earth's oceans reacted to its presence by oxidizing and precipitating out to form the hematite deposits from which Alaskan black diamonds would later be quarried.Learn more about Precious Metals & Gems
Diamonds are worn as jewelry and used in a variety of industrial applications. Diamond is the hardest natural substance in the world, and stones that are too small or do not have the requisite quality for jewelry mounting are often used as drill bits or ground into abrasive powder. Others become tools used to cut and polish gem-quality diamonds.Full Answer >
Someone who wants to sell their diamonds quickly should sell directly to the jewelry industry. An alternative option is to sell directly to a buyer.Full Answer >
On a carat for carat basis, rubies are worth more than diamonds of similar size and weight. The reason that rubies are more expensive is the fact that it is much rarer for rubies to be found without faults than it is to find a flawless diamond.Full Answer >
Pure purple diamonds are precious stones that are exceedingly uncommon in nature and often occur as synthetic diamonds. Pure purple ranks as the second rarest hue in diamonds.Full Answer >