A large-scale Jackson Pollock drip painting titled, "Number 7A, 1948."

Crystal Lau | CNBC

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Nearly $2 billion worth of art will come up for auction in New York over the next week, marking the biggest test of the art market since the start of the Iran war.

The major auction houses are counting on blockbuster works from famed collections to carry the market past the gloom of geopolitical conflict and volatile financial markets.…