Some of this is wild stuff! The deposition pressure varied from 400 mTorr to 1400 mTorr and the rf power from 50 to 250 W. The structural evolution studies show that beyond 200 W, we observed an amorphous-nanocrystalline transition, with an increase in crystalline fraction by increasing rf power and working pressure. Please enable JavaScript to use the Wait List sign up feature. Etsys 100% renewable electricity commitment includes the electricity used by the data centers that host Etsy.com, the Sell on Etsy app, and the Etsy app, as well as the electricity that powers Etsys global offices and employees working remotely from home in the US. American Express Want to know more? Quantity. Also, if you work the material, and the As of 2022 I have a couple hundred pounds of giant slabs available. Contact us today to see how we can get you set up with the finest quality knapping . I have some killer rough available too, most of it is the green & purple variety. charges to the email address you gave to PayPal once I have your order ready to ship. Yes those are bullet holes, it's a popular sport in the countryside. eLetters should provide substantive and scholarly commentary on the article. This involves striking the butt of the pressure flaker with a billet or other hard tool, and produces a different aesthetic in the end result, and puts less strain on your elbows. See the Tips section below for more information on choosing billets and pressure flakers. Add to Cart. 1.5 to 3 inch long flakes. As a small thank you, wed like to offer you a $30 gift card (valid at GoNift.com). It may contain patterns of gas bubbles remaining from the lava flow, aligned along layers created as the molten rock was flowing before being cooled. Sellers looking to grow their business and reach more interested buyers can use Etsys advertising platform to promote their items. Cookies and similar technologies are used to improve your experience, to do things like: Without these technologies, things like personalized recommendations, your account preferences, or localisation may not work correctly. Medium USPS Flat Rate box packed with 12 pounds of our #1 graded and cleaned 3-6 inch Flint knapping Spalls Mix (Heat Treated Keokuk, Georgetown Flint, Mahogany Obsidian, Black Obsidian, Flintknapping Spalls Mix - Large Flat Rate Box - Free Shipping. We strive to providethe cleanest, blemish freeknapping material within our means.