Complimentary shipping over $200

Blue Fire — 300 numbered pieces only

30-day returns · 2-year warranty

Sculptural eyewear — Drop 03: Blue Fire

Sculptural eyewear, formed under pressure.

Sculptural sunglasses and optical frames, hand-polished in Indonesia and released in numbered drops of 300.

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Free returns within 30 days · Complimentary shipping over $200

Featured
PUMICE K-02
Price
$210
Colour
Ash Bloom
Young man in a navy jacket and light blue shirt wearing slim grey-tinted sunglasses
Look 01PUMICE K-02 — Ash Bloom

Drop 03 — Latest releases

Blue Fire.

At night, the Ijen crater burns blue. We spent a year trying to bottle that light. Iridescent lenses, hand-polished acetate, numbered one by one.

◐ Limited to 300 pieces 127 / 300 remaining
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    The Campaign — Shot at Mount Bromo, East Java

    Born in the caldera.

    Model in round gold sunglasses resting in dark water, red lips and light rippling across her skin
    Look 02Sulfur Gold edit

    Every KALDERA frame begins as a sketch made at the edge of a volcano. We study how lava folds, how ash settles, how obsidian catches the light. Then we carve it, slowly, by hand, into something you can wear.

    “Glasses shouldn’t disappear on your face. They should make people look twice.”

    Ayu Prameswari — Founder & Creative Director
    Two models in black sunglasses against a cream wall, one lowering her frames
    Look 03MAAR K-01 — Obsidian
    Discover the Craft

    Four worlds, one crater

    Four collections. 29 frames.

    Every collection starts from one material of the volcano. Pick the one that sounds like you.

    Two translucent blue Blue Fire frames resting on an open fashion magazine 01 · Limited5 frames Blue Fire Our rarest light, captured in 300 pieces. Shop collection Two models in clear and wire-frame optical glasses against a deep red studio backdrop 02 · Core12 frames Obsidian Black glass, cut sharp. The everyday core. Shop collection Woman resting her head on a table in thin gold round optical glasses, a lemon in the foreground 03 · Optical8 frames Ash Bloom Soft, translucent optical frames for the long hours. Shop collection Three models in white tailoring and gold round sunglasses with red lips 04 · Sport-sculpt4 frames Tephra Shields and visors for the ones moving fast. Shop collection

    The Craft — Handcrafted in Bandung, Indonesia

    Forty steps from stone to frame.

    Every hinge is cast in titanium, every temple tip shaped by hand to rest exactly where it should.

    Close-up of layered rock in blue and tan, used as form reference Gloved hand shaping a wooden block with an orange sander in a workshop Hands polishing a small part against a buffing wheel 01 / 03 Form study
    1. 01

      Sketch

      Forms drawn from lava flows, ash dunes and fractured rock, collected on field trips to the craters of East Java.

    2. 02

      Carve

      Blocks of Italian acetate, a plant-based material that polishes like glass, are cut and shaped over 14 days. Each temple is fitted to a titanium core by hand.

    3. 03

      Polish

      Rolled in a drum for 72 hours, then hand-finished until the surface shines like obsidian. Every frame is numbered.

    Steps per frame
    40+
    Every edge is shaped by hand, so each frame sits comfortably all day.
    Hours of polishing
    72
    Rolled in a drum for a glass-smooth finish that resists everyday scratches.
    Lens protection
    UV400
    Blocks 100% of UVA and UVB rays, so your eyes stay protected.
    Year warranty
    2
    Free repairs for hinges and finish, so you buy once.

    Virtual try-on

    See yourself in KALDERA.

    Try any frame on your face in seconds, right from your camera. No app needed.

    Smiling man in a cream knit sweater wearing thin gold aviator glasses
    • Complimentary shipping over $200
    • 30-day returns
    • Prescription-ready
    • 2-year warranty

    Every frame is numbered, and only 127 of 300 Blue Fire pieces are left.

    Shop the Drop

    Worn by 1,240 people so far

    Frames people look twice at.

    4.8

    out of 5
    1,240 verified reviews

    • “I wear my FUMAROLE to every shoot. People ask about the frames before they say hello.”

      Maya R. Singapore · FUMAROLE K-07

    • “Heavy in the best way. The acetate feels like polished stone and the fit is perfect.”

      Daniel K. Berlin · MAAR K-01

    • “Ordered on Monday, in Melbourne by Friday. The packaging alone is worth it.”

      Priya S. Melbourne · PUMICE K-02

    • “The blue lenses catch the light in a way I have not seen on any other frame.”

      Kenji T. Tokyo · FUMAROLE K-07

    • “Light enough to forget I am wearing them. Three compliments before lunch.”

      Sofia L. Madrid · LAPILLI K-05

    • “Fit, finish, packaging: it feels like a gallery piece, not something off a shelf.”

      Omar A. Dubai · SCORIA K-04

    Before you buy

    Good to know.

    Do you ship internationally?

    Yes. We ship to more than 90 countries, and orders over $200 ship free. Most destinations receive their frames in 3–5 business days.

    Can I get prescription lenses?

    Yes. Every optical frame, and most sunglasses, can be fitted with single-vision or progressive prescription lenses at checkout.

    What if the frames don’t fit?

    Return unworn frames within 30 days for a full refund, or exchange them for another size at no cost.

    How does a limited drop work?

    Each drop is capped. Blue Fire is 300 pieces, and every frame is numbered. When a drop sells out, it does not come back.

    What does the warranty cover?

    Two years against manufacturing defects, including hinges and finish. Repairs are free.

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