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What does that mean: monocrystal "rare earth" silver and gold design
monocrystalline means one single crystal. Wire like that exist http://pubs.acs.org/doi/abs/10.1021/cg1003808 and I understand why they are expensive, ribbons cut out of a single copper or silver crystal. That also means it needs to be a single pure metal. A lot manufactures claim single crystal but they refer to OCC wires which have only less crystal boundaries than ordinary wire but are obviously polycrystalline.
Also why one includes rare earth (because it sounds expensive?)