Caesarstone Sdot-Yam Ltd. (NASDAQ:CSTE), a manufacturer of high quality engineered quartz surfaces, today reported financial results for its second quarter ended June 30, 2013. Revenues in the second quarter of 2013 increased by 17.9% to a record $89.0 million compared to $75.4 million in the same quarter of the prior year. Growth in revenues was primarily driven by continued increases in sales in the United States and Canada, up 33.6% and 35.3%, respectively, compared to the same period in the prior year. On a constant currency basis, second quarter revenue growth was 17.7% compared to the same period last year. Yosef Shiran, Chief Executive Officer, commented, "We are pleased to report another record quarter for sales and profitability, particularly in our fast-growing North American markets where quartz is increasingly embraced. This includes our Super-Natural design which has demonstrated rapid, global success. We continue to look forward to completing capacity expansion projects both in Israel and the United States to reinforce our growth capability, maintain our leadership position and create growth and value for both our customers and our shareholders." Gross margin in the second quarter was 49.8% and included a $3.5 million one-time positive impact associated with a change in estimate for the value of inventory following the implementation of the Company’s new ERP system in April of 2013. Excluding this benefit, adjusted gross margin in the second quarter was 45.9%, an improvement of 290 basis points compared to 43.0% in the same period in the prior year. This year-over-year improvement resulted from benefits of scale, higher margins associated with new products and favorable changes in the regional mix of revenues. Operating expenses in the second quarter were $22.1 million, including $1.4 million of non-recurring expense associated with the Company’s recent secondary offering. Excluding this cost, adjusted operating expenses were $20.6 million, or 23.2% of revenues. This compares to the prior year's second quarter level of $19.6 million, or 25.9% of revenues, which is adjusted to exclude a $1.0 million credit associated with the reversal of a litigation reserve.