Is a J-color diamond noticeably yellow?

J is near-colorless with a faint warm tint. Face-up in a white metal setting most people read it as white; beside a D–F stone the difference shows. Warm metals like yellow or rose gold hide the tint well.

Is VS2 clarity eye-clean?

Usually yes. VS2 inclusions are small and typically not visible without magnification, so at 0.66 ct the stone should look clean to the eye.

What do Excellent polish and symmetry mean here?

Both are GIA's top cut-related grades for finish. They mean the facets are cut and aligned precisely, which supports better light return and sparkle.

How big is a 0.66 ct round diamond?

It measures about 5.54–5.57 mm across and 3.47 mm deep. That reads as a modest but visible stone, smaller than a one-carat round of roughly 6.4 mm.

Does it have fluorescence?

No. The report lists fluorescence as none, so the stone won't take on a milky or blue cast under UV light.

Is it a good choice for an engagement ring?

Yes, if you value cut quality and a certified stone over higher color. Pair it with a white-metal setting for a whiter look, or warm metal to work with the J tint.