The Kimberly mugs include just a few rare examples, but are otherwise common and very inexpensive.  To my thinking these are the homeliest mugs produced in the Fire-King lines.  According to the Japanese Fire King Mug Book, (as translated to me) the pattern was named for a diamond mine in Africa and designed to resemble the raw diamond ore.  The results were achieved in a mug that is as ugly as a dirt rock. – even the very rare ones!

The jadeite Kimberly mug is very rare and I’ve never seen one offered for sale, as it has been reported to me that only 4 were made.  The value of this mug could exceed $500 today.  Other rare Kimberly mugs are shown below.  Luckily this is a shape that was not copied by other glass makers so if you find this in a flea market you can be assured it is an Anchor Hocking product.

The dark amber mug is actually not Fire-King but there are some genuine ones in this color.  Pretty common.  The next one is a different story.  The light amber or nearly crystal mug is very rare indeed.  I’ve seen only one on Ebay during 2004.  These are presented side by side so the difference is easily seen.

A very common graduated blue color, and a common peach luster example.

Common orange and yellow graduating color mugs.  Same color shading is easily found in other colors too.

A fairly rare mug called Aurora, but also referred to as pearl luster, or opalescent.

A standard white mug,  without the iridescence of the Aurora mug.