Zale Corp.Zale Corp. ( ZLC) was glittering in extended trades after the Dallas-based jewelry retailer said holiday sales were strong. The stock leapt nearly 6% to $4.26 on volume of more than 30,000. Based on a regular session close at $4.03, the shares are up roughly 15% in the past 52 weeks. Zale said same-store sales rose 8.5% over the November-December period and total revenue came in at $533.1 million, up 8% from $493.7 million in the same period a year earlier. "The Holiday sales results represent progress as we continue to stabilize the business and return to profitability," said Theo Killion, the company's CEO. "The investments we've made in our field teams, the clarity of our marketing message and our back to basics merchandising strategy were validated by our guests during the most critical selling period of the year." Zale is scheduled to report its fiscal second-quarter results on Feb. 23. The average estimate of analysts polled by Thomson Reuters is for earnings of 81 cents a share for the three-month period ending Jan. 31 on revenue of $584 million.