The Clusters were full of metal artifacts, but in alloys too tough to convert.

Before analysis begins, metal artifacts require intensive cleaning.

What makes this assemblage so unusual is that these relatively common African metal artifacts are presented, not as ethnic materials, but as abstract sculpture.

"Along with all this porcelain, there's a lot of metal artifacts and organic articles," he said.

The planet can be seen to bear many large stone and metal artifacts suggesting cities, now obviously quite silent and deserted.

However, the ground conductivity measurements showed an anomaly in the electromagnetic signature that it was thought might be caused by metal artifacts buried with the head.

Both human populations shown in the book live at a neolithic level of technology, with some metal artifacts such as fishhooks.

Some copper bells and ornaments were recovered from Quiriguá, they are among the earliest finds of metal artifacts in the Maya area.

Information about metal artifacts can be obtained through X-ray of concretions.

A few metal artifacts from the ship remain atop a mound of shingle.