In the three months ending March 31, 2013, Blue Nile’s sales were up 16.9 percent (on y-o-y basis), to $97.1 million. The first quarter delivered profit worth $832,000 (the same was $154,000 in March 2012), for the online retailer. Cost of sales jumped 17.2 percent to $79.5 million.

The retailer noted a healthy increase in sales of diamond engagement rings, which rose 19 percent (on y-o-y basis) to $55.3 million. Also, the company noted that its four consecutive quarters have seen a double digit growth, reports say. The non-engagement segment reported sales increase of 7 percent to $24.2 million. Sales in the international markets were up by 25 percent to $17.6 million.