80Kč
Velikost 7 x 4 cm
Není skladem
Rohovec – sedimenty Jizery
Naleziště : ČR
Rohovec je mikrokrystalická odrůda křemene. Tyto vznikly v sedimentech téměř vždy mořského původu vysrážením oxidu křemičitého. V době kamenné se nejčastěji druhy rohovců, hlavně pazourky, používali na výrobu nástrojů a zbraní.
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