Compare Contemporary to Traditional Navajo Jewelry

What is the difference between traditional Native American jewelry and contemporary Native American Jewelry. 

This pendant is a perfect example of contemporary Southwestern Native American jewelry.  Navajo silver work will include sharp lines made combining sterling silver, stones and 14k gold.  In Ron Henry's work, he uses turquoise, coral, opal, azurite, malachite, sugilite and charoite to name a few. Ron's work is authentic and handmade. 

Here is an example of a traditional Navajo bracelet.