Quartzite Case Pro Black Venom, back: black quartzite with white veining, black frame and lens ring

Nº 14

1/4

Quartzite Case Pro · Black Venom – Black Quartzite iPhone Pro Case

€120,00

Incl. VAT, plus shipping

Black Venom quartzite from Brazil, black with light veining – harder than marble, set in a Pro case with aluminium buttons and a raised lens ring. For iPhone 18 Pro, 18 Pro Max, 17 Pro and 17 Pro Max.

Model iPhone 18 Pro Max iPhone 18 Pro iPhone 17 Pro Max iPhone 17 Pro

Frame Black Satin

Another combination in mind? We’ll make it happen →

Quartzite is not marble: it forms when sandstone fuses under heat and pressure into one of the hardest natural stones. Black Venom is a black quartzite from Brazil, run through with light veins. At first glance it recalls Nero Marquina – but that is a marble. The grain is different too: quartzite is made of tightly fused quartz grains and looks almost glassy when polished, marble of softer calcite crystals. Black Venom is denser, more scratch-resistant and less sensitive to acids. It sits polished on the back of the Pro case. Everything around it is built for daily life: the lens ring and buttons are CNC-milled aluminium. The lens ring stands slightly proud, so your iPhone never rests on its camera. The metal buttons press easily and can be swapped, and the Camera Control sits protected under TPU in the frame colour.

Every piece is one of a kind. The photos show an example – the veining on your veneer will run differently.

At a glance

Stone Black Venom from Brazil – quartzite
Surface polished, 0.8–1.2 mm thick
Frame whisper-thin TPU from Germany in five satin colours, Alcantara lining
Protection corner cut-outs cushion impacts
Lens ring CNC-milled aluminium, raised to protect the camera
Buttons CNC-milled aluminium, easy to press; Camera Control protected under TPU
Aluminium colour matched to the frame, replaceable – sets in five colours as add-ons
Fits iPhone 18 Pro Max, 18 Pro, 17 Pro Max and 17 Pro
Charging wireless, MagSafe as add-on
Made by hand in our workshop in Germany

Size & weight 82 × 167 mm · approx. 38 g, of which stone 14 g

Black Venom was once sand. Quartz-rich sandstone was carried deep into the earth, under so much heat and pressure that its grains recrystallised and locked into one another. Loose rock became a dense, almost glassy stone: quartzite.

At around 7 on the Mohs scale it is harder than most granites and far harder than marble. The black is the ground; the light veins are minerals that settled in fine cracks.

The stone comes from Brazil and is quarried only in small quantities. In the trade it is often simply called Venom. Large slabs of it clad kitchen islands and entire walls.

On the case, such a slab becomes a piece that exists only once: we split it to around one millimetre and polish it until the grain begins to shine.

More about Black Venom →

Every order is made individually for you and shipped worldwide from Germany. Everything about withdrawal is in our withdrawal policy.

For the USA and the United Kingdom, duties and import taxes are already included at checkout – there is nothing more to pay on delivery. For other countries outside the EU, import duties and taxes may apply and are not included in the price. Custom Tailoring pieces are made to your specifications and are therefore excluded from the right of withdrawal.

Case: Real natural stone with a Black Frosted case. Without the aluminium buttons, aluminium lens ring or additional air cushions of the Pro version.
Case Pro: Real natural stone with a satin-finish TPU case in several colours. CNC-machined aluminium buttons and an aluminium lens ring, anodised in matching or contrasting colours. Integrated air cushions provide extra impact protection.

The same commitment to real natural stone. The difference is in the case, the details and the added protection.

Mix & Match
Aluminium buttons and a lens ring in your favourite colour: matching or contrasting. Buy them separately, swap them out and give your Pro Case a new look.

Black Venom Quarzit als großformatige Rohtafel in der Steinhalle

The story behind Black Venom

Sand turned black

Black quartzite with white veins

Before, there was sand

It all begins as sand. Quartz grains laid down in a sea or riverbed that vanished long ago. Layer upon layer, until it becomes sandstone. Soft, porous, unremarkable. Nothing you would put near a wrist or a phone yet.

Pressure

Then the Earth bears down. The sandstone sinks deep into the crust, under heat and load of the kind only colliding continents produce. The grains dissolve and grow back, interlocked, without a single pore between them. Break this stone and it breaks straight through the grains. That is quartzite.

III

Black

Pure quartzite would be white. Black Venom is deep black, and no one has studied exactly why. In other black quartz rocks it is the finest carbon particles, trapped between the crystals. The white veins run through the stone like cracks in lacquer, sharp and irregular.

Minas Gerais

The stone comes from Minas Gerais, the state that made Brazil the biggest quartzite country in the world. Around a hundred varieties leave here for the trade. Venom is one of the newest. The exporter lists it among its new releases.

Wire and stone

Quartzite is too hard for chisels and explosives. The blocks are cut out of the wall with diamond wire, cut by cut, tonnes at a time. Only this technique made the stone viable. Then it travels to Espírito Santo, where the blocks are sawn into slabs. Almost 80 percent of Brazil’s natural stone leaves the country through the ports there.

Hardness 7

On the Mohs scale, Black Venom sits at about 7. Harder than granite, far harder than marble, and it barely absorbs water. That is why it ends up in kitchens, on walls, around fireplaces. And why it takes what a phone goes through every day: keys, table edges, pockets.

VII

Tenths of a millimetre

In the workshop we split the slab into veneers so thin they hug the case. Because the white veins never run the same way, no two pieces are alike. That is why you choose yours yourself. Piece by piece, with a photo.

Black Venom

Quartzite in your hand

Sand, pressure, stone, veneer. Now set in the Pro case with aluminium buttons and a raised lens ring. Your piece exists exactly once, and you carry it with you every day.

Images: symbolic photographs and illustrations, not pictures of the quarry mentioned. Credits: Kier in Sight Archives, Adrian Fiodor, Alena Lavrova, Gabriel Hurtado Paoleschi, Tim Schmidbauer, Jakub Skafiriak (Unsplash) · Vania Passos, CC BY-SA 4.0 · EduardoMSNeves (Pedra Azul), CC BY-SA 4.0 · Wikimedia Commons

Material

Millions of years in the mountain. 12 years of experience. 0.9 millimetres.