This box of material contains a well rounded mix of select knapping stones that include some of everything we have to offer: Georgetown Flint, Heat treated Keokuk, Dacite, Obsidian, and possibly some Novaculite (limited availability). These 3-6 inch mixed spalls are ideal in size for producing medium to large points and blades. Priority Mail Postage within the United States is pre-paid and included in the price of this 20 lb box of 3-6 inch Mixed Spalls.
International Customers should contact us for adjusted shipping and other limitations before purchasing.
Georgetown flint occurs in a narrow range of grayish colors, of which the steel-blue/grey glassy translucent variant known as "Georgetown Blue" is the highest quality for knapping. In fact it’s probably one of the best quality materials anywhere in North America and is highly sought after. Arkansas Novaculite most often is white to off white but can sometimes be found in shades of black, translucent, red, and purple. Keokuk is a high quality chert found in parts of Oklahoma and surrounding areas. Keokuk is typically cream to pink colored when heated, and may contain bands and speckles of bright red and brown. Dacite and Obsidian are both translucent black or grey igneous stone found in areas with past volcanic activity. Dacite is more textured and 'stone' like than Obsidian, which is essentially volcanic glass.
WARNING: Obsidian and Dacite flakes can be sharper than razor blades! Exercise extreme caution! We highly recommend using gloves to work these materials as they will make even the most experienced knapper bleed.
We strive to provide the cleanest, blemish free knapping material within our means. On some spalls however, blemishes do get past us because not all defects are evident at first or even second inspection. In efforts to avoid defects as much as possible, we perform a few thinning blows to ensure that you do not pay for large amounts of waste, over thick spalls, or fragile/thin sizes that will shatter with the first strike.
Large knapping material requires large billets. Attempting to knap large stone with too small of a billet will damage the billet and not produce sizable thinning flakes early on in the process as needed. If you are graduating to this size material from one of our kits, we recommend adding a large copper percussion billet to your order. If you are unsure about what you need, please visit our Flintknapping Buyer's Guide, or feel free to contact us and we will be glad to help.