Deshaun Watson’s wife-to-be sports $2M rock on her finger!

Deshaun Watson’s wife-to-be is walking around with a house on her finger — TMZ Sports is told Jilly Anais’ engagement ring has a value of AT LEAST $2 million!!

We spoke with the jeweler who provided Watson with the stunning ring he used to propose to his longtime girlfriend over the weekend … and got all the details on the jaw-dropping accessory.

Vikar Ahmed told us the rock is called “The Glory Treasure” … and holds over 20 carats of the finest diamonds, including color D-E-F & clarity IF to VVS.

“At the heart of this exquisite piece lies a premium D center diamond, renowned for its perfect cut and exceptional color & flawless clarity,” Ahmed said.

Ahmed said the diamond is a Type IIA by GIA … recognized as the purest chemical diamond in the world.