Five premium,Obsidian Flint Knapping Knife or Spearhead Preform Blanks (2)

Description

(2)
These are five exceptional, eye-catching obsidian preforms for knapping spearheads or knives.  They represent some of the best obsidian in my preform collection and were accumulated over the years from Internet purchases, rough obsidian rock purchased in Quartzite, Arizona, and rock dug up near Burns and Glass Buttes, Oregon.
The photographs against the green background were taken in the shade, while the photos of the individual preforms were taken in the sunlight.  The actual colors and patterns, however, are even more beautiful in the direct sunlight, as the preforms are covered with water and rotated on different angles to reflect the sunlight.  They do not have any cracks and are ideal for flat-knapping or FOG (flake-over-grind) knapping.
The sizes are shown in the first two photos and additional details are provided below, beginning on the left in the first two photos:
The first preform is rainbow obsidian and is a little over 1/4" thick;
The second is a very unique, speckled gray and white obsidian preform.  It is a little under 1/4" in thickness;
The third is a very unique and beautiful triple flow obsidian preform, measuring 1/4" in thickness;
The fourth preform is a beautiful mahogany and black obsidian and is 9/32" thick; and'
The fifth is a beautiful and unique triple-flow obsidian preform.  It is also 9/32" in thickness.
Note
: Obsidian like I am selling on eBay is becoming increasingly difficult to find these days, as many of the pits in Northern California and Southern Oregon have been closed by the federal government.  I even have difficulty finding high-quality obsidian at the rock and gem shows in Quartzite, Arizona.