Pyrite

Here is a superb pyrite specimen from the 2018 season at Navajun, which produced some of the finest .....

Pyrite specimens are not uncommon, but pieces like this one with large, sharp crystals and brilliant.....

This single cubic pyrite crystal is 3.1" from outside-tip-to-outside-tip, and 1.9" along the longest.....

This is a very aesthetic specimen of cubic pyrite in the creamy marl matrix they grew in. The brassy.....

This is an amazing specimen of pyrite, crystallized as a very sharp (and 100% natural) cubic crystal.....

Here is a dramatic and rare pyrite crystal from the Merelani Hills, which is best known for tanzanit.....

This cubic crystal of pyrite is amazing: it is large (3.2" from tip-to-tip and 1.9" along the longes.....

Here is an excellent specimen of pyrite, crystallized in very sharp cubic shape, measuring 2" on the.....

Navajun pyrite is renowned for its sharp, nearly perfect cubic crystals. This is as fine a group of .....

This brightly polished pyrite sphere is perforated with open vugs that are lined with crystals. Thes.....

There are two crystals in this twinned pair, measuring a huge-for-the-species and -locality 3.4" fro.....

This highly aesthetic specimen of PYRITE (also called Fool's Gold) features a brilliant, brassy yell.....

Here is a superb specimen with 2 large pyrite cubes perched on a chunk of marl matrix. The cubic pyr.....

Pyrite crystals with a brassy golden color and smooth, highly reflective faces are highly valued by .....

A heart made out of pyrite? Fascinating! Perforated with open vugs all over the surface? Wow! This p.....

One of the more interesting forms of pyrite coming from Peru these days is polished spheres.  T.....

This stunning specimen features 2 large pyrite cubes perched on a chunk of marl matrix. The interloc.....

This is a very aesthetic specimen of cubic pyrite crystals in the creamy marl matrix they grew in. T.....

This superb specimen is a tight cluster of 5 near-perfect, interlocking pyrite cubes. There are 4 sm.....

The pyritohedral crystals on this Peruvian pyrite specimen are very sharp, with mirror-bright luster.....