Description:

This auction is for 100 grams (about 3.53 ounces) of Black Iron Oxide.  You will get your 100 grams measured out on an electronic scale, accurate to 1/10 of a gram, I will also add a little bit extra for good measure.  I will ship the package as soon as possible after receiving payment.
The auction starts at only one cent ($0.01).

I can accommodate different sized orders if desired by special request in additional auction listings.

If you have any question, please ask.

Payment:
I accept PayPal and money order.  I prefer PayPal because it is the quickest
form of payment.

Shipping:
I will ship just about anywhere you want  in the world.  If you want to want me to ship internationally (outside of the United States), it is best to check with me and confirm the shipping price.
Shipping cost: $6.99 total S&H

Uses:
Iron Oxide has many uses, as a pigment for coloring/dyes, in chemical
reactions, and more.
-pigment: Iron oxide is commonly used as a pigment for coloring all
sorts of materials, like paints, plastics, and rubber. It is also used
for the dye in tattoos. The major colors that can be created by iron
oxide are red, black, yellow, and brown.
-catalyst: Iron oxide can be used as a catalyst, or a means to create
a reaction between two other substances without being used itself, in
many reactions. One reaction in which iron oxide is a catalyst is the
converting of carbon monoxide, a toxic gas, into carbon dioxide, a
necessary gas for the planet. Another instance in which iron oxide is
used as a catalyst is the synthesis of ammonia. Many other reactions
can be performed using iron oxide as a catalyst.
-magnets: Certain magnets, called “ceramic” or “ferrite” magnets, use
iron oxide as a raw material, along with barium or strontium carbonate.
These magnets are inexpensive and they have a high force, but they are
brittle and crack easily. 
-source of heat: When iron oxide is reacted with aluminum, it releases
great amounts of heat, enough to weld metals together. The exothermic
reaction of iron and oxygen to create rust is widely used in heat packs.
-Black Iron Oxide, since it is magnetic, is also widely used to make "ferro fluids", or fluids that will respond to a magnetic field.

http://physchem.ox.ac.uk/MSDS/IR/iron_II_III_oxide.html

Iron Oxide:

iron (II, III) oxide
Formula as commonly written: Fe3O4
Formula weight: 231.533
Class: oxide

Synonyms:
Iron (II, III) Oxide
Ferrosoferric oxide
Triiron tetroxide

Physical properties:
Colour: Black
Appearance: crystalline solid
Melting point: 1538 C
Density: 4.8 - 5.1 g/cm3

Dangers:
-Iron oxide is not toxic, although some dangers are present when the
fumes or dust of iron oxide are inhaled.
-Inhalation of any metallic fumes or dust can cause irritation to the
throat and nasal area. They can also irritate the eyes.
-Extended inhalation of iron oxide in high concentrations in the form
of dust or fumes can cause pulmonary effects, eventually resulting in
siderosis (inflammation of the lungs).

I cannot be held responsible for anything you do using any of my products.

Pictured is a pile of 100 grams of Iron (II, III) Oxide