Quartz or Granite? Choosing a Countertop for San Antonio Heat and Sun

Granite is quarried stone, cut into slabs and polished. Every slab is different, and some have dramatic movement that you’ll want to pick in person at the slab yard. It’s porous to a degree that depends on the stone, which is why most granite gets sealed.

Quartz is engineered. Crushed natural quartz is bound with polymer resin and pigments, then pressed into slabs. That resin is what makes quartz nonporous and consistent from slab to slab, and it’s also the reason quartz reacts differently to heat and sunlight.

Granite formed under extreme heat, so a hot pan set down briefly won’t hurt the stone itself. The risk is thermal shock in a spot with a hidden fissure, or damage to the sealer, which is rare.

Quartz is different. The resin can scorch, discolor or crack if you set a pan straight from a burner or oven onto it. A trivet solves that completely, but you have to use it every time. If your household tends to slide pans off the range onto the nearest surface, granite is more forgiving.

Ambient heat in a closed-up summer house is not a concern for either one. Even a kitchen that sits warm all afternoon stays far below what would affect quartz resin.

This is where the choice gets clear. Ultraviolet light can slowly fade or yellow the resin in standard indoor quartz, especially in bright white and pale gray colors. Indoors behind ordinary window glass that’s rarely a visible issue, though a counter under a big unshaded west window may change slightly over the years.

Outdoors, standard quartz is a poor fit. Our patios get hours of direct summer sun, and most manufacturers don’t warrant indoor quartz for exterior use. For an outdoor kitchen, granite, a sealed dense natural stone or an exterior-rated porcelain slab are the safer choices. We cover more of that in our guide to outdoor kitchens in South Texas heat.

Beyond heat and sun, the two materials trade small wins. This comparison covers what tends to matter in a working family kitchen.

• Stains: quartz is nonporous and shrugs off wine, oil and turmeric. Sealed granite resists well, but an unsealed light granite can darken under oil.
• Maintenance: quartz needs only soap and water. Granite needs resealing on a schedule that depends on the stone, often every one to three years.
• Scratches and chips: both are hard. Granite is slightly harder, while quartz edges can chip if struck with a heavy pot.
• Hard water: neither etches from mineral spots, unlike marble, so both clean up well with a damp cloth.
• Look: quartz is consistent and great for clean, uniform designs. Granite offers one-of-a-kind movement you cannot copy exactly.
• Seams: quartz seams can be nearly invisible on solid colors. Granite seams depend on how well the pattern is matched across slabs.

Prices overlap so much that cost alone rarely decides it. Entry-level granite can be cheaper than mid-range quartz, while exotic granite can cost more than nearly any quartz.

Typical installed ranges run $58 to $112 per square foot for quartz counters and $49 to $118 per square foot for granite. These are planning figures, not quotes.

• The slab itself, its color group and its rarity
• How many slabs the layout needs, and whether seams can be hidden
• Edge profile, from a simple eased edge to a mitered waterfall
• Cutouts for sinks, cooktops and faucet holes
• Removal of old counters and any backsplash damage repair
• Support brackets for wide island overhangs

Both materials take an undermount sink well, and both can run up the wall as a full-height backsplash. Quartz is easier to match for a slab backsplash because the color stays consistent from slab to slab. With granite, we lay out the slabs and pick which section goes behind the range so the veining flows rather than jumps.

Weight matters a little. A three-centimeter granite slab and a three-centimeter quartz slab are close, and both need level, solid cabinet boxes underneath. If you’re keeping older cabinets and only replacing the top, we check that the boxes are square and sturdy first. Sagging or out-of-level bases can crack either material during install, and that’s a cheaper problem to fix before stone arrives than after.

Color also plays with light. San Antonio kitchens with big south or west windows get a lot of warm afternoon light, which can make a cool white quartz look slightly blue in the morning and creamy by evening. Look at samples in your own kitchen at a few times of day before committing.

A short list of honest answers usually points to the right material faster than looking at a hundred samples.

• Will you reliably use trivets, or do pans land wherever there’s room?
• Does any part of the counter sit in direct sun, indoors or out?
• Would you rather never think about sealing again?
• Do you want a uniform look or a slab with strong natural movement?
• Are you matching an island and perimeter, or mixing materials?
• How long is the run, and will seams fall in visible spots?

For an indoor kitchen where the household is busy and nobody wants a maintenance schedule, quartz is usually the easier choice. For a serious cook who wants a counter that tolerates hot pans, or for any surface outdoors, granite tends to make more sense.

Plenty of homeowners split the difference. Granite on the perimeter by the range, quartz on the island where kids do homework, or the other way around. If you’re torn, talk it through with us by phone and bring photos of the slabs you’re considering.