Is a teal sapphire good for an engagement ring?

Yes. Sapphire is corundum, 9 on the Mohs scale, so it resists scratches far better than emerald or opal. A round stone this size works well as a center stone in a solitaire or halo.

Will the teal color look different in person?

Sapphire color shifts with lighting; teal stones often look greener in daylight and bluer indoors. Ask for photos and video in natural light before you buy.

What setting fits a 7.55 by 7.45 mm round stone?

That is close to a standard 7.5 mm round, so most round settings sized for a 1.5 to 2 ct round will work. Have your jeweler confirm the exact seat before setting.

Does it come with a lab report?

No report is listed for this stone. If certification matters to you, ask the seller whether one can be arranged, or have it appraised after purchase.

Can I request a different gemstone or a finished ring?

The seller states the design can be made with gemstones of your choosing and takes custom requests before purchase. Ask about a finished ring if you do not want to source a setting yourself.