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The widespread popularity of glass beads does not mean aboriginal bead making is dead. Perhaps the most famous Native bead is wampum, a cylindrical tube of quahog or whelk shell. Both shells produce white beads, but only parts of the quahog produce purple. These are ceremonially and politically important to a range of Northeastern Woodland tribes.
Malachite is a copper carbonate hydroxide mineral, with the formula Cu 2 CO 3 (OH) 2.This opaque, green-banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and deep, underground spaces, where the water table and hydrothermal fluids provide the means for chemical precipitation.
Copper is a chemical element; it has symbol Cu (from Latin cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color.
United States passports are passports issued to citizens and nationals of the United States of America. [7] They are issued exclusively by the U.S. Department of State. [8] Besides passports (in booklet form), limited-use passport cards are issued subject to the same requirements. [9]
Verdigris in Prague Underground. Verdigris is a collective term for copper acetate, whose chemical varieties produce different hues. The technical literature is inconsistent in describing these variations. Some sources refer to "neutral verdigris" as copper (II) acetate monohydrate ( Cu (CH3CO2)2· (H2O)) and to "blue verdigris" as Cu (CH3CO2)2 ...
Amazonite, also known as amazonstone, [4] is a green tectosilicate mineral, a variety of the potassium feldspar called microcline. [4] [5] [6] Its chemical formula is KAlSi 3 O 8, [1] [7] which is polymorphic to orthoclase . Its name is taken from that of the Amazon River, from which green stones were formerly obtained, though it is unknown ...