Kate Alexandra is the collection I'd point to if someone wants a serious diamond piece without an artist's name driving the price — the work is in the metal and the stones, not a signature. Fifty-four pieces are live now, $550 to $45,000, median $3,900, and every one of them ships made to order rather than pulled off a shelf.

What "made to order" means for this collection

Nearly every piece — from a $550 heart necklace up to a $45,000 diamond tennis necklace set with 16.50 carats of round brilliant stones — is built after you order it, in your choice of 18K yellow, white, or rose gold, and ships in two to four weeks. That's not a fulfillment note buried in the fine print; it's the whole model, and it's why the collection can offer this many gold and diamond combinations without warehousing all of them. The stones vary by piece: round brilliant is the standard cut, but several pieces — the cocktail rings especially — mix in rose-cut diamonds for a flatter, more antique face, and a few use natural fancy colored diamonds, including a light pink stone on one ring. One bracelet, the Splash, uses a house alloy called Plata Aurum — a blend of silver, platinum, and gold — instead of a single-color gold, which is unusual enough to be worth knowing before you assume every piece here is standard karat gold.

Necklaces first, then rings and pendants

Necklaces make up half the collection — 26 of the 54 pieces — with pendants and rings splitting most of the rest. Chain length is a real decision here, not an afterthought: most necklaces come in a 16" or 18" option on a fine Italian cable chain with a lobster clasp, so check which length you're getting before you order. At the upper end, carat weight climbs fast — an 11-carat radiant-cut tennis bracelet, a 16.21-carat pavé bangle that twists open rather than clasping shut, a dragonfly cocktail ring mixing 0.45 carats of round brilliant with 6.57 carats of rose-cut stones. At the entry point, a diamond accent runs a fraction of a carat on a $550 to $1,200 necklace, which is where most first orders land.

Because everything here is made to order, call us before you order if you want a metal or chain length combination outside what's listed, or if the carat total on a piece isn't specified clearly enough for you to decide. Two to four weeks is standard; a piece built around several carats of matched stones can run longer, and it's worth asking rather than assuming.

— Steve Schlag, founder, Dolphin Galleries