Unglazed ceramic
Smooth, matte and crisp-edged, molded to shape.
- Absorbs
- Moderate, even release
- Tip
- Glaze one face for color, keep a porous zone
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Ceramic and aroma stone diffusers
Ceramic Car Diffusers and Aroma Stone Formats
A porous stone or unglazed ceramic absorbs a few drops of fragrance oil and releases it slowly into the car. No power, no airflow, no plastic reservoir, and it refreshes again and again with a refill oil. As a ceramic car diffuser supplier, Coman produces stone and ceramic diffusers in custom shapes, colors and finishes, with matching oils and gift packaging.
- Ceramic, plaster, lava, diatomite
- Embossed logos
- Refill oils with dropper
- Gift-ready sets
A few drops, slow release
Choose the porous carrier
Four stones, four characters
Each material behaves differently with oil and wear. We recommend one based on design detail, durability and how often customers will add oil.
Aroma stone
Plaster or gypsum: soft matte, fine detail, pastel or white.
- Absorbs
- High, quick to soak in
- Tip
- Best for decorative pieces
Lava stone
Rough, natural and dark, with a large surface area.
- Absorbs
- High
- Tip
- Beads on cords or in clips
Diatomite
Light, porous mineral with a matte finish.
- Absorbs
- High
- Tip
- Flat discs and pads
Carrier or housing?
The stone can be the product itself, a pendant or a vent face scented directly, or a replaceable insert inside a metal, wood or plastic holder. Choose the structure first, then the material.
Shapes and finishes
Molded shapes with a natural "in use" look
- Molded shapesDiscs, hearts, flowers, leaves, geometric forms and logos
- Logos and patternsEmbossed or debossed into the stone
- ColorNatural white, tinted body colors, or a partial glaze on one face
- CombinationsA stone face in a metal frame, or stone beads strung with wooden beads
Oil gives light stones a slightly deeper tone where it soaks in, a look many brands use to show the product is working. We test your oils on the chosen finish during sampling, so you know exactly how it will appear.
Fresh stoneClean, even tone
With oilA warmer tone where the oil soaks in
Mounting and holders
Every stone comes with a holder that keeps surfaces clean
A dish, clip or cord keeps the scented stone off leather and dashboard plastics, and the instructions show how to add oil and let it soak in before mounting.
- Vent clip
A stone face or disc on a clip.
- Hanging
A pendant on a cord, or a bead string.
- Seated
A stone in a small dish or holder on the console.
- Visor clip
A stone disc on a visor holder.
Refilling with oil
A few drops, whenever the scent fades
Supply the stone with everything customers need to keep it going:
- A starter bottle of fragrance or essential-oil blend with a dropper.
- Separate refill oils in the same scents.
- Clear instructions on how many drops to add.
- An oil matched to the stone, so it soaks in quickly and evenly.
Honest material names sell
"Unglazed ceramic diffuser", "plaster aroma stone", "volcanic stone beads". We give you the material facts for each product, so pack and listing copy is clear and accurate.
Materials and responsibilityJudge it in hand
Shape detail, color, absorption and how oil darkens the finish show best on physical samples, so we send them with the oils you plan to sell.
Request samples
Gift sets
A natural gift
A stone diffuser, one or two oils and a spare stone in a box with a molded insert: one of the easiest gift sets to sell, for essential-oil brands, design-led ranges and holiday promotions.
- Stone diffuser
- One or two oils
- Spare stone
- Molded insert box
How often do customers add oil?
Whenever the scent fades, a few drops at a time. Warmer cabins and more porous stones call for a top-up a little sooner.
Can you mold our logo?
Yes. Logos are embossed or debossed into ceramic and plaster stones.
Will oil change the stone's color?
Light stones take on a slightly deeper tone where oil is absorbed. You see the effect on your samples before production.
Is ceramic more durable than plaster?
Fired ceramic is harder; plaster stone allows finer detail and suits decorative pieces. We advise based on your design and use.
Discuss a ceramic design
Tell us about your stone diffuser
Material, shape, logo, color, mounting, oils, gift packaging and quantity. Send a sketch or reference and we suggest the best stone for it.
- 01We recommend a carrier, structure and finish for your design.
- 02You receive a quotation per shape, oil and pack.
- 03Samples arrive with your oils so you see the finished look.