Best diamond tennis necklaces in white 14k gold under $1200

Start with the 2mm Diamond Tennis Necklace in White Gold — it's the one that actually reads as a fine-jewelry tennis necklace: natural diamonds in SI1–VS2 clarity, a slim 2mm line that sits flat and looks right with a plain white tee or a dress, and a length range from 16" to 22" so you can pick choker-tight or collarbone.

Who the others suit:

• The 3mm white gold tennis necklace — if you want more presence and sparkle per inch; the wider line reads dressier and photographs bigger.
• The 5mm version — for someone who wants a statement piece rather than a delicate one; it's the boldest of the group and the heaviest on the neck.
• The cushion-cut and oval-cluster styles — if you'd rather have a less common look than the standard round-brilliant row.
• The micro tennis necklaces — for a first piece, a gift, or layering with a chain you already wear.

Two things worth knowing before you buy: check the metal stamp on the listing, since several of these are white gold plated or 18k rather than solid 14k, and confirm whether the stones are natural or lab-created — both appear in this price range and it changes what you're paying for.