Horace Grant's 3-Peat Bulls Title Rings Hit Auction, Could Fetch $100k+ Each!

In search of more, rare Michael Jordan-era memorabilia? Horace Grant's got ya covered -- 'cause TMZ Sports has learned MJ's former Chicago teammate's three title rings he won with His Airness in the early 1990s are up for auction.

The rare items come from the Bulls' first 3-peat in 1991, 1992 and 1993 -- when HG played a key role alongside Jordan and Scottie Pippen.

The rings feature the former power forward's last name ... with the Bulls' season record on one side and the World Champion title year/postseason record on the other.

We're told each ring -- which are all size 12 and have "14k Jostens" on the interior bands -- is so valuable, they could fetch over $100K apiece.

Heritage Auctions officials tell us each ring also comes with a letter of provenance from Grant as well.

Grant's 2001 championship ring that he earned while playing alongside Kobe Bryant and the Los Angeles Lakers is also up for grabs. That bling, we're told, is expected to sell for over $40k.

FYI, Grant is not the consignor for the rings -- we're told Horace sold his rings a long time ago for charity.