Is a lab grown diamond a real diamond?

Yes. It is chemically and physically the same as a mined diamond, just grown in a lab. It has the same hardness and sparkle.

How does an elongated cushion compare with a round brilliant?

The elongated shape covers more of the finger and looks larger for the same weight. A round brilliant usually throws more sparkle back at the eye.

Is 14K yellow gold a good choice for an engagement ring?

Yes. 14K gold is hard enough for daily wear and hides small scratches better than softer high-karat gold. Yellow gold also needs less upkeep than white gold, which is rhodium plated.

Will the ring fit under a wedding band?

The solitaire setting sits low enough that most straight wedding bands sit flush beside it. Try both on together if a matched look matters to you.

Does a lab grown diamond hold its value?

No, not like a mined stone. Lab grown diamonds resell for much less than their purchase price, so buy it for the ring, not as an investment.

What should I check when it arrives?

Look at the stone under bright light for visible inclusions and confirm the prongs are even and snug. Have a jeweler inspect the setting if you plan to insure it.