1. Signet's bridal business saw 6% growth in average unit retail. 2. Lab-grown diamonds comprise 40% of bridal sales, increasing from mid-30s. 3. Despite 3.1% overall sales growth, Q4 guidance is below estimates. 4. Signet's stock fell over 14% amid cautious store traffic outlook. 5. Adjusted EPS rose to 63 cents, raising full-year guidance.