Jake Paul 's heading into his Anthony Joshua fight locked and loaded ... El Gallo just commissioned one of the most amazing chains you'll ever lay your eyes on, made with a whopping 364 carats of diamonds!

TMZ Sports has learned the 12-1 pro boxer copped the insanely bling-y piece from famed jeweler, Vobara , ahead of his highly anticipated December 19th matchup.

This chain's composition is wild ... we're told each "round" is loaded with 5 carats of high-quality, oval VS1 diamonds, all mounted with one kilo of 8-karat rose gold.

In total, that's an astounding 364 carts! Play video content

It's not the first time Paul and Vobara have collaborated, and they always produce masterpieces.

The Miami jeweler is the designer behind some of Jake's best accessories, like his iced-out

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