Rock Refill
$19.95
Replacement lava rock. A bag of 275g, enough to refill either diffuser.
Most people buy this to change scent over. The stones keep what they're given, and rinsing works, but a fresh set is faster and it's a clean start. Tip the old ones out and save them for another time. Then fill it up, add a few drops.
The rocks themselves don't expire. Swap them when you want a different scent in the same vessel, or when they've had enough.
Pairs with:
What's in the box
Something missing? Let us know.
How it works
Shipping and returns
Currently shipping within Australia only.
Sent via Australia Post, all order shipped each business day.
60 day change of mind policy. See our Returns and exchange policy for full details.
How it works.
3 simple steps to use the rock diffuser
Pick your scent
Whatever fits the room and the hour. There are no wrong answers, just louder and quieter ones.
Add a few drops
Into the water tank or straight onto the rocks. Start with 2 and see how the room takes it.
Get on with your evening
The scent does its thing without being asked twice. That's the whole point.
Add your rocks.
Add the drops.
Enjoy.
Drop it on the stones
Straight onto the rocks. No water, no power, no cords. Go a little heavier the first time, they like to soak it in.
Put them where you pass by
The scent sits close, about a metre or two. Desks, bedside tables, bathrooms, the entry.
Top up when it fades
A few drops a day keeps it going. For a new scent, let the old one fade out over a week or rinse the stones and start again.
Full instructions come in the box. Questions any time at hello@undertones.com.au.
Pick a scent.
Every diffuser needs a scent. Find yours.
Every scentDiscovery Set
Try all 5 of our scents in 5ml bottles.
Grove
Fresh, citrus and woodySmells like cool air and sunlit trees
Vineyard
Berries, earth and mossSmells like dense mossy vines at dusk
Hearth
Creamy, spicy and sweetSmells like a cold afternoon around a warm bakery
Midnight
Classic, Fresh and cleanSmells like night air and city lights.
Alcove
Woody, Smokey and sweetSmells like creamy vanilla with sweet spice
Save more when you bundle.
Bundle your diffuser with oils to save.
