Is a princess cut a good choice for an engagement ring?

Yes, if you like a square outline. Princess cuts look larger face-up than rounds of the same weight, but their sharp corners are more vulnerable to chipping, so prong coverage matters.

How does platinum compare with white gold?

Platinum is denser and naturally white, so it needs no rhodium plating. It scratches and dulls over time but wears away slowly, while white gold is harder but needs replating to stay bright.

What should I check on the diamond itself?

Ask for the grading report and look at cut, color, clarity and carat. In princess cuts, check the corners and the setting's prongs, since those protect the most fragile points.

Can this ring be resized?

Platinum bands can usually be resized by a jeweler, but full-eternity or heavily detailed bands limit how much. Have the fit confirmed before any work.

Does it come with a certificate?

Tiffany diamonds typically come with the company's own diamond certificate and grading documentation. Confirm what paperwork is included with the specific ring.