Coral, especially red coral ... since the largest and most valuable ones are steeped in mystery. One black diamond, the Spirit of de Grisogono, is believed to be 312.24 carats but was sold ...

Coral reefs are both a breeding ground for commercially valuable fish and critically important ... It has led to a rising black market, with Indonesian smugglers shipping illegally harvested ...

The more scientists study the Red Planet, the more they find unusual objects and patterns scattered across Mars' surface. Here are some of the most baffling.

In North America and other parts of the world, you may encounter a red and black snake along your hike and wonder if you're dealing with a venomous snake species or something like a harmless milk ...

Olowalu reef may offer hope of surviving climate change, just four miles from the Maui fire epicenter. Learn about ...

Asia has the longest coastline of any continent, and the richest coral reefs on Earth. Its seas are connected by some of the ...

Found all over the world, calcite is the most stable form of calcium carbonate and is the main mineral found in limestone.

it is predominantly decorated with black enamel and has an onyx plinth. In common with the present clock, Farouk’s clock also had appliquéd Roman numerals set with diamonds and ridged coral decoration ...

Thursday’s episode featured a black-tie bash at an exclusive jewelry store where Elsbeth ... Hepburn’s character in ...

Next stop, the Spud State? National Geographic has published its annual list of “Best of the World” travel destinations for ...

At first glance, the coral snake vs. king snake distinction can seem borderline impossible. But these two reptiles are worlds apart in terms of how they live, hunt and defend themselves.