Which is for the scratch test?

Which is for the streak test?

If it leaves no streak the mineral is harder than the

A streak is left by every mineral softer than the

you can scratch every mineral softer than 2.5 with a

corundum can scratch even the ___ since the hardness of corundum is 9

If it sparkles or shines like metal it is

A(n) ___ is a rock from which we extract metals

All metal ores are

Why do we often use only metallic/nonmetallic as our luster classifications?

Why should we trust the streak test?

A fingernail easily scratches this mineral. It's hardness is

White powder easily scratches off this greenish mineral with a fingernail. It has a white streak. What is it?

This mineral is obviously

Your fingernail cannot scratch either of these. They cannot scratch a penny. The hardness is

These two crystals scratch test between 2.5 and 3.0. The crystal on the left is ___ based on its shape and the fact that it's salty.

These two crystals scratch test between 2.5 and 3.0. The crystal on the right is ___ based on its shape

This mineral is soft and smelly. It is

All are yellowish, the left samples are ___ and the right sample are ___ - this tells you which chart to look at.

Both are yellowish, the right samples are submetallic, they scratch glass, and they leave a dark green streak. The right samples are

These are two samples of bauxite and two samples of hematite. Both are rusty reddish-brown showing the presence of

These are two samples of bauxite and two samples of hematite. Both are reddish-brown and both leave a reddish brown streak and both show a hardness about 6. What should you do next?

These are two samples of bauxite and two samples of hematite. Both are reddish-brown and both leave a reddish brown streak and both show a hardness about 6. The 2 samples on the left show a mixture of minerals which is characteristic of

This is a common aluminum ore. It is a mixture of several minerals collectively called ___. (Look it up!)

These leave a reddish-brown rust-like streak and can scratch glass. They are obviously an iron ore called

These two are both

Both scratch glass but the left metallic is magnetic. What is it?

Both scratch glass but the right is nonmetallic and leaves a medium gray streak. What is it?

This mineral is powdered by a fingernail but not as easily as talc. It leaves a white streak and is used to make the walls in our houses.

This scratches glass and can also scratch the porcelain plate (leaves no streak). Look at the shape. It is

These two minerals are

The two minerals on the left show

The two samples on the right easily write on paper but the 2 left samples are much harder. The samples on the right are ___ and the samples on the left are ___.

These are all samples of a mineral that is magnetic and scratches glass

Check out that color! Doesn't look metallic. The streak of the green part is also green. It's a copper ore known as ___

These two look similar but the left one scratches glass and the green one does not. The right one fluoresces under ultraviolet (UV) light and it's called ___.

These two look similar but the left one scratches glass and the green one does not. No taste for either and neither reacts with acid. Left is ___

These are very similar except for their

Both of these easily cleave into sheets. Both are

Both of these easily cleave into sheets. They are both mica. The more transparent on the right is called

Both of these easily cleave into sheets. They are both mica. The black one on the left is called

Notice the gold/bronze flakes. This is commonly called ___

Notice the gold/bronze flakes. Although not magnetic, it is an iron ore that scratches glass known as

By definition all minerals are crystal in form. Why didn't we see many crystals?