ST Quartz · ST Stones' core proprietary quartz line
Royal Gregio Quartz
Royal Gregio is part of ST Stones' core ST Quartz line — the brand's proprietary engineered-quartz range covering whites, grays, blacks, and accent colors. The line is the value-to-mid tier anchor of the ST Stones catalog. Standard ST Quartz slabs ship in approximately 74–75 sqft slab format. We confirm slab availability and current pricing at the consultation.
About Royal Gregio
Royal Gregio quartz - what to know
Character
How Royal Gregio reads in a kitchen
Royal Gregio carries gray with warm brown undertones — a 'greige' read that bridges cool grays and warm beiges, useful when your floors or cabinets straddle both temperatures.
South Florida fit
Why quartz works in our climate
Quartz is one of the strongest countertop choices for Palm Beach County kitchens. The surface is non-porous (so it won't absorb spills the way a natural stone can), it's highly heat-resistant up to the typical countertop range, and it shrugs off humidity — no sealing required, ever. Royal Gregio ships with the same maintenance profile as every other quartz in this catalog.
Pairings
Cabinetry, hardware, and design context
Royal Gregio pairs naturally with cream, off-white, or warm-gray cabinetry and oil-rubbed bronze or aged-brass hardware. We always recommend laying the actual slab next to your cabinet sample before final commitment — quartz photographs differently from how it reads in person under your kitchen's actual lighting.
Specs at a Glance
Royal Gregio - quick reference
| Material | Quartz |
|---|---|
| Color family | Gray/Brown |
| Series / line | ST Quartz |
| Thickness | 2CM or 3CM available |
| Slab format | Standard slab format (confirmed at consultation) |
| Finish | Polished |
| Care | Daily wipe with mild soap; no sealing required (non-porous engineered surface) |
| Best applications | Perimeter counters, islands, bathroom vanities |
| Service area | All Palm Beach County, FL - free in-home consultation |
Cabinet Pairings
Best paired with Royal Gregio
Our top cabinet recommendations for a Gray/Brown quartz countertop, hand-picked from the Royal install palette we use most often in Palm Beach County.
Related slabs
Other ST Quartz and Gray/Brown options
Compare Materials
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Where we install Royal Gregio - and what to read next
Closest Palm Beach County cities
Get In Touch
Quote on Royal Gregio
Let's build something beautiful together.
Interested in Royal Gregio quartz? Request a free in-home consultation and we'll price your kitchen or bathroom with this slab — itemized quote, 3D rendering, no obligation.
Sat: By appointment
Frequently Asked Questions
Common questions about Royal Gregio
Does Royal Gregio need to be sealed?
No. Quartz is engineered (roughly 90–93% natural quartz aggregate bound with resin) and is non-porous, so it never needs sealing. Wipe daily with mild soap and water; avoid harsh abrasives and leaving acidic spills (citrus, vinegar) sitting on the surface for extended periods.
Is Royal Gregio heat resistant?
Quartz handles brief heat contact well, but the resin binder can discolor under prolonged direct heat. Use a trivet for hot pots and pans straight off the stove. Don't set a heat-treated cast-iron skillet directly on the slab. No quartz is heat-proof in the way a true natural stone or solid-surface stone like soapstone is.
How big is a slab of Royal Gregio?
Royal Gregio typically ships as a standard slab (~74-75 sqft each). Final slab dimensions and current inventory get confirmed with the distributor during your project — we'll walk you through the slab-pair selection so vein flow reads consistent across any seams.
Countertop care, fabrication, and certification standards referenced on this page follow guidelines from the Natural Stone Institute, the NKBA — National Kitchen + Bath Association, and the ISFA — International Surface Fabricators Association.