BENSENVILLE, Ill.--(BUSINESS WIRE)--Rubicon Technology, Inc. (NASDAQ:RBCN), a leading provider of sapphire substrates and products to the LED, semiconductor, and optical industries, today reported financial results for its second quarter ended June 30, 2015 and announced the signing of a resource sharing agreement with another sapphire polisher aimed at more rapidly reducing polishing costs. Second Quarter Results The Company reported second quarter revenue of $7.1 million, lower than the prior