Остроконечник (наконечник копья), мезолит Франции
for this type of knife the size deliberately pointed and slim shape. I make the possibility that this may be head of some big spears (EPIEUX) or spear (SAGAIS). being given that information can not be confirmed because no trace of such tools of wood was discovered and confirmed. by cons found in other type of civilization which possesses large arrow slots. here which lead me to determine that it isthe concave side could be used for strapping. take the flat side rests in the notch of a wood. very plausible theory .cut for Aerodinamical
flint blond white patina of the Paris Basin MESOLITHIC / NEOLITHIC type of debitage Levallois method .SIZE 90 MM ref 967
10.000 TO 3.000 BC
most of them are Middle Paleolithic. some are Upper Paleolithic and some of its objects are some early Neolithic , but the definition is difficult.
because I was often asked the same question about the age I said it's actually quite easy, the patina is the result of an alteration of flint blond by particular component of the earth in this region. is an extremely long process. on some parts, it reaches 1 / 2 mm. it's a good way of dating but not infallible it depends on the burial environment. on flint dating back three or four thousand years is superficial alteration of tenth of a millimeter, but it is decreasing which mean it takes longer in the second tenth. you can see the example photo of a cut in slices and the patina over two millimeters.(not in sale)

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Остроконечник, орудия, мезолит. Махана, Ирландия