Corundum: Use as a Gemstone, Abrasive, Refractory

Corundum is used as a gemstone, abrasive, refractory and much more. Red corundum is a ruby, blue is a sapphire, any other color is a fancy sapphire. Synthetic ...

International Transport and Insurance Costs of .

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UNCTAD Integrated Trade Intelligence Portal Home .

TRAINS NTMs, the global nontariff measures database, provides comprehensive and systematic information on a broad range of policy instruments that can have an effect ...