Snoop Dogg is breathing new life into the motto “one man’s trash is another’s treasure” … with a full-scale sale of his half-smoked blunt roaches turned cannabis collectibles!!!

TMZ Hip Hop caught up with Snoop out in Bev. Hills this week for a sneak peek at his upcoming collaboration with artist Erica Kovitz — “Rich N Infamous: The Joint Venture.”

Kovitz preserved Snoop’s roach tips with a plastic and chrome proxy atop pigment panels on acrylic … and even fused in cannabis residue to enhance the designs!!!

As you can see, they’re pretty hefty stumps — Tha Doggfather has plenty of weed to spare!!!

Snoop praised Erica’s curation skills, telling us the hazy art was up for grabs … for the right price, of course. You can’t actually smoke them … but your 420 sessions will always have an incredible backdrop!!!

They’re launching an appointment-only studio located at 9891 S. Santa Monica Blvd in Bev. Hills to display the gallery in June … offers are already mounting up, especially seeing that every piece is one-of-a-kind.