BARRIO (TMZ) – Karol G was drippin’ in diamonds at the VMAs … all the bling combined was worth north of $2 mil … according to the jeweler who gave her the goods for her big night.

Celebrity jeweler Eric Mavani tells TMZ … he was hired to provide Karol with all the bling she needed for Tuesday night’s event, which turned out to be A LOT.

Eric The Jeweler says her chain was 90 carats strong — 30 pink pear-shaped diamonds, and 60 white oval-shaped diamonds. That accessory would set ya back a mil.

But, that’s not all … she also wore a 10-carat pink heart ring worth $900k and 40-carat bracelets costing $250k each. She had on some blue, white, and pink flower drop earrings that are 10 carats and worth $75k.

Were told the grand total was around $2.5M  … and all those carats must’ve been a good-luck charm, because she took home the award for Best Collab with Shakira.

BTW, some folks thought Karol was snubbed by not winning Artist of the Year and Best Latin.