With its sizable weight, a stone countertop is the only way to keep kitchen islands from running off for their archipelago's family reunion. Keep kitchen sets from bolting with today's Groupon: for $250, you get $500 toward countertop material, delivery, and installation from CounterEdge in Waltham. This deal is valid for homes within 50 miles of downtown Boston.

Using one of the most advanced fabrication workstations in the world, CounterEdge harnesses digital design technology to forge stone countertops. Proliner digital templating equipment lets technicians capture dimensions and surface points for your countertop space, then create a fully rendered digital template that will be imported into the Fabcenter fabrication workstation. One of only five in the world, the Breton Fabcenter cuts, edges, and polishes each slab of igneous artwork, and can outfit countertops with sink cutouts that can accommodate sinks that spout water or sinks that dispense melted chocolate.

CounterEdge offers granite or marble surfaces ($39–$59/sq. ft.) as well as quartz or recycled-glass selections ($49–$79/sq. ft.), all available in a 1.25-inch or three-quarter-inch thickness. While prices vary according to size and scope, CounterEdge can equip kitchens with a 1.25-inch absolute black granite countertop for around $3,750 or a 1.25-inch verde ubatuba granite countertop for around $1,985. Choose from an appetizing selection of colors, including chocolate truffle, blizzard, and mocha, or more earthy hues, such as sapphire blue, absolute black, or smoky ash.

While today's deal includes one sink cutout and eased edges, CounterEdge can slice up stone with additional entryways for kitchen sinks ($350) and cooktops ($250). By ensuring that slabs pass through fewer fabrication stations, the Fabcenter helps conserve energy and man-hours; also, CounterEdge captures all water used during fabrication but does not reuse it to produce pumice-flavored energy drinks.