Does it come with a chain?

No. It is the pendant only, with no chain and no clasp. You need an 18K yellow gold chain to wear it.

What size chain should I pair it with?

A chain heavy enough to hold a 4-carat stone without sagging. A 1.5 mm to 2 mm 18K yellow gold cable or box chain is a sensible match.

Blue topaz is almost always heat- or irradiation-treated to deepen its color. Assume this stone is treated unless a certificate says otherwise.

About 4.1 carats total weight in a round cut. That is a large stone for a pendant, so expect a noticeable drop on the neck.

Yes. Topaz rates 8 on the Mohs scale, so it handles daily wear well, though it can chip on hard knocks and should be kept away from harsh chemicals.

It works as a gift for someone who already wears gold chains, since the pendant alone is not ready to wear. Blue topaz is also a December birthstone.

At Marks Jewelers, for $1,197.00, 40% off, as of our latest check.

$1,197.00at Marks JewelersChecked 4 h ago

Prices are checked against each store and labelled with when.

It checks today's price at every store, compares the alternatives and answers in about a minute.