I list both the primary color, and the secondary color for this wood as purple, that is not a mistake, the wood has contrasting depths of purple throughout, showing grain in a lighter to darker purple color.
Purpleheart pen blanks are cut from Purpleheart, also known as Amaranth, a VERY hard wood, found from Mexico through Central America.
Nominal dimensions: 5"x.75"x.75".
Relatively easy to work with, as long as you keep your tools sharp, it will quickly create burn marks, especially if you let a dull tool rub against it. Resin buildup should be controlled using appropriate cutting lubricants for your tools. Though it has some interesting grain patterns in some of its lumber, its most striking characteristic is its color. The purple jumps out at the viewer, especially when finished with a clear, smooth, high gloss finish, giving it a great finished look in custom turned pens. This wood is hard enough that it prefers to make more of a sawpowder, that a sawdust when using power tools.
Useful links on Purpleheart:
The USDA provides a large list of wood species with links to information about their properties: https://www.fpl.fs.fed.us/research/centers/woodanatomy/techsheets_display.php?geo_category_id=4&genus_commonname_criteria=c&sorting_rule=1a
If you do not know about wood allergies and potential issues while working with wood, the following link presents some information you should be familiar with while working with wood: http://www.woodweb.com/knowledge_base/Danger_in_the_Woods.html I have used this link without permission, as I was unable to find contact information for Custom Woodworking Business.
Some useful information on preventing color changes in exotic hardwoods is available at: http://www.wood-database.com/wood-articles/preventing-color-changes-in-exotic-woods/