Enough stellar music, gems, and oysters to leave you shell-shocked.

BUY
Rebecca Lankford Trunk Show
What: Matsu introduces the jewelry designer’s precious and semiprecious pieces to Boston.
Why: Bling it on.
When: Fri. & Sat., 11 a.m.-6 p.m.; Sun., 1-4 p.m.
Where: Matsu, 259 Newbury St. (617-266-9707).

EAT
OysterFest
What: A three-day celebration of Wellfleet’s favorite bivalve.
Why: Aw, shucks.
When: Fri., 10 a.m.-1 a.m.; Sat., 10 a.m.-8 p.m.; Sun., 9 a.m.-5 p.m.
Where: Various locations, Wellfleet.

Progressive Feast
What: Down one course after another — each in a different $1 million-plus home, cooked by a different chef (Michael Schlow, Barbara Lynch, Joanne Chang, or Marc Orfaly). Proceeds go to Children’s Hospital.
Why: Home cookin’.
When: Sat., 5-9 p.m.
Where: The Pinehills, 33 Summerhouse Dr., Plymouth (508-209-2000). Tickets are $125 each.

Great Chefs Spill Some Ink
What: Buy a cookbook by Boston’s best chefs (to benefit Friends of Dana-Farber Cancer Institute) and meet the likes of Ana Sortun, Paul O’Connell, and Deborah Hughes.
Why: It’s a recipe for giving.
When: Sat., noon-3 p.m.
Where: Cross Store, Zero Brattle St., Cambridge (617-868-7020).

HEAR
Super Diamond
What: The world’s best Neil Diamond tribute.
Why: Some wine with that cheese?
When: Fri. at 8 p.m.
Where: Paradise Rock Club, 967 Commonwealth Ave. (617-562-8820).