Rasmussen Alterna Vented FireStones Sets – Ceramic Fireplace Stones for Vented Gas Fireplaces & Fire Pits (Multiple Color Mix & Size Options)

Create a clean, modern fire display with the Rasmussen Alterna Vented FireStones Sets. Designed as a stylish alternative to traditional gas logs, these ceramic stones transform your vented gas fireplace or fire pit into a contemporary focal point with sculptural, river-rock-inspired shapes.

Each FireStone is crafted from high-heat ceramic refractory material that’s engineered specifically for use in vented gas fire features. Unlike natural river rock, these stones are made to handle direct flame without cracking, popping, or exploding, while still delivering a natural, organic look around your burner.

You can choose from single colors or popular mixed color combinations to match your décor. Rasmussen’s proprietary, environmentally friendly ceramic stain coloration absorbs into the stone’s surface for a transparent, variegated finish that looks like real stone and doesn’t burn off like paint so your color ages gracefully over time.

Available in multiple set sizes from 18" to 36", each kit includes a balanced mix of large, medium, and small stones to create a full, layered presentation that conceals your burner and showcases the flame. Stones only burner sold separately so you can pair them with your preferred vented burner system.

Specifications

Product & Brand

• Product Name: Rasmussen Alterna Vented FireStones Sets – Multiple Color Options

• Brand/Series: Rasmussen Alterna – Vented FireStones

• Product Type: Decorative ceramic stones for vented gas fireplaces and fire pits (not for vent-free use)

Applications

• For use in vented gas fireplaces or vented fire features with compatible pan/burner systems

• Intended to hide/dress the burner area and create a modern stone fire bed

Material & Finish

• Material: Ceramic-bonded refractory, high-heat capable

• Finish: Proprietary ceramic stain coloration

  • Transparent, slightly non-uniform appearance for a natural stone look

  • Absorbs into pores rather than sitting on top like paint

  • Color does not burn off under normal use; ages gracefully over time

Color Options

Single Colors

• Natural (base material, tannish gray)

• White

• Black

• Dark Gray

• Light Gray

• Beige

• Brown

• Adobe Red

Popular Mixed Color Sets

• Calico (CX): White, Black, Light Gray, Beige, Brown, Adobe Red

• Black / White / Beige (BWB)

• Black / White / Light Gray (BX)
  (Specific mixes offered may vary by retailer; check product options when ordering.)

Set Size Details

• 18" Set:

  • 6 Large stones

  • 6 Medium stones

  • 7 Small stones

• 24" Set:

  • 6 Large stones

  • 12 Medium stones

  • 14 Small stones

• 30" Set:

  • 12 Large stones

  • 12 Medium stones

  • 21 Small stones

• 36" Set:

  • 6 Large stones

  • 30 Extra-large stones

What’s Included

• Assorted FireStones in selected color or color mix

• Stones sized and counted according to chosen set width (18", 24", 30", or 36")

• Burner, pan, gas controls, and media such as embers or glass are not included.

Key Features & Benefits

• Modern Alternative to Gas Logs
  FireStones give your fireplace or fire pit a clean, contemporary look, perfect for modern, transitional, or minimalist spaces where traditional logs feel out of place.

• Durable, High-Heat Ceramic Construction
  Made from ceramic-bonded refractory material, these stones are engineered for direct-flame applications and resist cracking, popping, or exploding unlike natural river rock.

• Customizable Color & Style
  Choose single colors for a sleek monochrome bed, or opt for mixed color sets like Calico or Black/White/Beige for a more dynamic, designer look tailored to your décor.

• Proprietary Ceramic Stain Finish
  Rasmussen’s environmentally friendly ceramic stain penetrates the surface, giving each stone subtle variation and long-lasting color that won’t peel or burn off like normal paint.

• Balanced Sets by Size
  Each set includes a thoughtful mix of large, medium, and small stones (or extra-large stones on 36" sets) to create depth, coverage, and a visually natural layout without guesswork.

• Pairs with a Variety of Vented Burners
  Designed for use over vented pan burners and embers pans, FireStones work in many single-sided fireplaces and linear fire features, indoors or outdoors, when used per burner and code requirements.

Why Choose This Product

If you love the idea of a modern, intentional fireplace design instead of traditional gas logs or random rocks, the Rasmussen Alterna Vented FireStones Sets are a smart, design-driven choice.

Compared to basic decorative stones, these FireStones offer:

• Purpose-built, high-temperature refractory construction for vented gas burners

• Professionally curated set sizes that properly fill common 18"–36" fireboxes

• A wide range of colors and curated color mixes for design flexibility

• A ceramic stain finish that holds its color and develops character over time, instead of burning off or flaking

For homeowners, that means a fireplace or fire pit that looks like it came from a designer showroom and stays beautiful season after season. For designers and installers, these sets are spec-friendly, consistent, and easy to scale, making it simple to repeat a look across multiple projects or properties.

Deliver Results with Love

The Rasmussen Alterna Vented FireStones Sets are more than just stones they’re the finishing touch that makes your fire feature feel complete. Each piece is designed to work quietly in the background: protecting your burner, framing the flame, and giving family and guests a beautiful fire to gather around.

By choosing these FireStones, you’re investing in safety, durability, and a carefully crafted look that shows how much you care about the details of your space. The mix of sizes, the nuanced ceramic stain colors, and the modern aesthetic all come together to create a fire that feels warm, welcoming, and uniquely yours.