A Bold Black Quartz Undermount Sink for Granite, Quartz, and Solid Surface Countertops

The Karran QU-712-BL is a single-bowl quartz undermount kitchen sink in a deep matte black finish, designed to mount beneath granite, quartz, or solid surface countertops in a 36-inch or wider base cabinet.

Key Features

• Single large bowl measuring 30 inches long by 16-1/4 inches wide by 9 inches deep for generous wash-and-prep capacity.
• Quartz composite construction with a matte black surface that reads as a continuous design element beneath a dark or contrasting countertop.
• Undermount installation into granite, quartz, or solid surface countertops only.
• Requires a 36-inch minimum cabinet width for proper fit and installation.
• 3-1/2 inch drain opening to accept standard kitchen drain hardware.
• cUPC and IAPMO certified for plumbing code compliance in the US and Canada.

Where Black Changes the Kitchen

Most kitchen sinks disappear into the countertop. A matte black quartz sink does the opposite: it reads as a deliberate design choice, whether it contrasts against a white or light stone countertop or echoes black hardware and fixtures elsewhere in the kitchen. The single oversized bowl works well as the main prep and cleanup station in a kitchen where visual continuity matters as much as function. A 9-inch depth keeps the bowl practical for tall pots and deep soaking without forcing the faucet higher than comfortable.

Quartz Composite, Built for Daily Kitchen Use

This sink is made from quartz composite, an engineered material that combines crushed quartz with resin to produce a dense, hard basin. The matte black surface does not show water spots the way a polished finish does, which is a practical benefit on a sink used daily. The quartz composite body absorbs impact better than ceramic and resists the thermal shock that comes from alternating hot and cold water. Because it is an undermount, the counter runs cleanly to the bowl edge with no rim collecting debris at the seam.

Who This Sink Suits

This sink fits a kitchen remodel or new build where the countertop is being fabricated in granite, quartz, or solid surface, and the design calls for a sink that stands out rather than blends in. Designers specifying a bold, monochromatic kitchen will find the matte black finish coordinates naturally with black faucets, hardware, and fixtures. Cabinet shops and contractors building out a kitchen with a 36-inch base sink cabinet can plan around the 32-inch overall width and the 9-inch bowl depth. This is an indoor kitchen sink; it is not rated for outdoor installations.

Common Questions

A Single-Bowl Black Sink That Earns Its Place in the Design

Choose the Karran QU-712-BL when the kitchen calls for a sink that pulls its weight as both a workhorse bowl and a design statement, backed by cUPC and IAPMO certification for confident code compliance.