Diamonds.

Said to be a girl's best friend.

Karl Marx on Use Value and Value.

• Wikipedia article.
• A History of Diamonds.
• Diamonds on ebay.
• Source for below:

Diamond Grading
Diamond Cut
Diamond Clarity
Diamond Color
Carat Weight
Diamond Certificates
Diamond Flourescence
Diamond Ring Settings
Shapes
Asscher Cut Diamonds
Cushion Cut Diamonds
Emerald Cut Diamonds
Heart Shaped Diamonds
Oval Diamonds
Pear Shaped Diamonds
Princess Cut Diamonds
Radiant Cut Diamonds
Round Brilliant Diamonds
Glossary

Recommended Diamond Stores
Mondera
Blue Nile

Vintage Jewelry Ads and Catalogs
Vintage Jewelry Ads