Crystal Gallery 2

Richard Howey's HomePage  

A look at some more crystals using polarized light with a few exceptions which will be noted.  I am indebted to my friend Janice Heath for providing the Sal Soda for making up some very interesting slides.


 Sal Soda crystals with partial polarization and a compensator.

                                Sal Soda crystals

                                Sal Soda crystals

  Sal Soda crystals with crossed polars and a compensator.

                     Generic Alkaseltzer crystals

Codeine sulfate.  I take this for my migraines and got curious about what kind of crystals it would form, so I sacrificed a tablet.

Inderal which is a beta blocker used for blood pressure. This looks rather like a crysalline sea urchin.


                       Pseudoephedrine crystals

                      Aluminum Ammonium sulfate

                    Aluminum Ammonium sulfate

                       Aluminum Potassium sulfate

                         The antibiotic Cephalexin

This is an intriguing crystal of Magnesium sulfate.  Its form is quite like that of a minute aquatic organism called an ostracod.

This also is Magnesium sulfate.  As you can see, the same substance can crystallize in radically different ways.

Here we have Magnesium sulfate mixed with a drop of a generic toothache medicine.

Sodium thiosulfate which is sometimes used in photographic processes.

Quinine sulfate which has a long history in the treatment of malaria.

Potassium sodium tartrate or Rochelle salts.  These are frustrating to work with because they are diliquescent, that is, they draw water out of the atmosphere and so are difficult to maintain as stable crystals on a slide.

Pseudoephedrine mixed with generic toothache medicine.

Another example of Pseudoephedrine mixed with generic toothache medicine illustrating again the great variation one can find on a single slide.