“Collectors are back,” Queens’ Wreath Jewels’ Tina Little told us Saturday evening, as she feted a couple dozen of her best customers on a sunset cocktail cruise around Sarasota Bay aboard the 110-foot yacht, The Entrepreneur, that she’d chartered from Vern and Sandy Buchanan.

On board, and taking center stage amid a glittering display of his new collection of jewels and those of his wife, Laura, was Beverly Hills-based master jewelry designer Michael Beaudry of the eponymously named House of Beaudry.

So what are high-end jewelry collectors buying? “They’re highly focused, asking, ‘How can this enhance my existing collection?’” Tina says. “And they’re concentrating on understated pieces.” All the rage right now: black diamonds. Tina herself was wearing a long strand of faceted black diamond beads interspersed with the occasional white diamond, in all about 400 carats. “This is a $100,000 necklace,” she told us, “but you’d never know it.”

At cruise’s end, before disembarking, we stopped to thank Tina for the experience, but she was otherwise occupied, surrounded by buyers snapping up baubles.