iron pyrites
iron pyrite

They could see why gold had seemingly blended into iron pyrites.

It is made on a large scale by the oxidation of iron pyrites.

I heard the striking together of stones, probably iron pyrites, and saw sparks.

"It fooled a lot of people in the old West - iron pyrites.

He examined the ore that the workers had hacked away, but found it rich only in iron pyrites.

A form of iron pyrites (iron sulfur compound) was also reported present.

The glistening, brass-coloured fragments I mistook for gold were iron pyrites.

Striking iron pyrites together she showered sparks into tinder, dried grass from the summer.

"Nothing but iron pyrites, although Althorn's machine indicates gold beyond.

A natural catalyst, the iron pyrites could have assembled chemicals like carbon monoxide into biological building blocks.

Two pieces of iron pyrites.

Iron pyrites in the silty shale are symptoms of an anoxic environment.

When the wetlands are drained the iron pyrites in the soil are exposed to air and form sulphur acid.

Iron pyrites have been observed to have formed crystals in the form of pseudoicosahedra.

Vast quantities of iron pyrites (FeS) were burnt in the town.

The iron pyrites in the clay can heat up when exposed to the air and occasionally ignite the shales.

The high ledge we supposed to be porphyry, containing crystals of iron pyrites and compact feldspar.

"Iron pyrites," identified Bob with a scowl.

Dr. Wächtershaüser favors some mineral surface like iron pyrites, also known as fool's gold.

The piles of tinder and flint and steel, or iron pyrites, lay now behind us, or to one side.

By Selwood's testimony, the first sample containing iron pyrites should have been dated one day after the stockholders' meeting.

When the water is however allowed to seep into mines it is oxidised and polluted by the exposed iron pyrites.

The eye sockets still have traces of beeswax, showing where the snakes' eyes, possibly made from gold-coloured iron pyrites, were stuck in.

What I hunted was iron pyrites, and I found several chunks and broke off two pieces to use in starting a fire.

She picked up the iron pyrite again, and looked at it closely.

They could see why gold had seemingly blended into iron pyrites.

It is made on a large scale by the oxidation of iron pyrites.

I heard the striking together of stones, probably iron pyrites, and saw sparks.

"It fooled a lot of people in the old West - iron pyrites.

The ore turned out to be worthless iron pyrite.

Then she picked up the flint and struck it sharply against the iron pyrite.

As the name implies, the flintlock used flint rather than iron pyrite.

It wasn't just one rock, but three small nodules of iron pyrite stuck together.

It was a lucrative source of iron pyrite.

He examined the ore that the workers had hacked away, but found it rich only in iron pyrites.

She held the three shiny nodules of iron pyrite, stuck together, tight in her fist.

A form of iron pyrites (iron sulfur compound) was also reported present.

However, iron pyrite inclusions may lead to acidic rainwater runoff.

The blue/grey colour is given by iron pyrite.

She held out both her hands and showed the iron pyrite in one and the flint in the other.

The glistening, brass-coloured fragments I mistook for gold were iron pyrites.

She placed sticks of kindling nearby, then bent down low and struck the iron pyrite with flint.

She struck her fire-starting flint against the yellowish-gray chunk of iron pyrite.

Ayla gave him the small nodule of iron pyrite.

Striking iron pyrites together she showered sparks into tinder, dried grass from the summer.

Iron pyrite was heaped up and allowed to weather as described above (an early form of heap leaching).

"Nothing but iron pyrites, although Althorn's machine indicates gold beyond.

A natural catalyst, the iron pyrites could have assembled chemicals like carbon monoxide into biological building blocks.

I became enthralled by chemistry when I found my first sample of iron pyrite ("fool's gold") 50 years ago.