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One Curve, One Stone, and the Small Brass Ball Nobody Notices First
- by zhanglei
Severn Lighting · Behind the Design
One Curve, One Stone, and the Small Brass Ball Nobody Notices First
Four decisions made the Cordelia. A field guide to the reasoning behind a sconce that looks inevitable — and wasn't.
— Good light is an argument you never have to hear —
The Cordelia Alabaster Globe Wall Sconce — 45 cm / 17.7″ high, projecting 15 cm / 5.9″ from the wall.
In Short
The Cordelia Alabaster Globe Wall Sconce is a hardwired wall light combining a hand-carved globe of genuine natural alabaster with a single-curve brass arm and a polished brass counterweight ball. It measures L 25 cm × W 15 cm × H 45 cm (L 9.8″ × W 5.9″ × H 17.7″) and produces a soft, uneven, honey-toned glow because the light passes through the stone rather than reflecting off a shade.
Best in: bathrooms (mounted in pairs beside a mirror), hallways, and bedsides where a table lamp is one object too many.
Most wall sconces are decoration with a bulb inside. You register the fixture before you register the light. The Cordelia was drawn to invert that — to read as quiet architecture in daylight, then dissolve after dark into the thing it produces. That single constraint decided everything downstream. It ruled out clear glass, which shows you the filament. It ruled out metal shades, which throw a hard cone and leave the fixture itself dark. It pointed instead at a material that transmits.
Below are the decisions, in the order we made them. Get one wrong and the whole piece tips.
Hand-finishing. The dust in the air is the shade taking shape.
The Case for Genuine Natural Alabaster
Chosen for what it does to light, not for how it looks switched off
Alabaster is soft enough to be shaped by hand and — this is the part that matters — translucent. Hollow it thin and light doesn't stop at the surface; it enters the stone, scatters through it, and emerges warmed. That is a physical property, not a finish. No coating, no frosted glass, no printed marble film reproduces it, because those materials reflect light where alabaster carries it.
It also means every globe glows differently. Where the stone runs thin it brightens. Where a mineral vein crosses it, the light picks the vein out in amber. Two Cordelias hung side by side will not match. In a factory that is a defect. Here it is the product.
| Material | Genuine natural alabaster, hand-carved and hollowed |
| Light behaviour | Transmitted, not reflected — soft, diffuse, warm |
| Surface | Cream to pale grey, with amber-to-caramel veining |
| Variation | Expected. Colour, veining and glow differ piece to piece |
Alabaster is naturally porous. Wipe with a dry or barely damp soft cloth — never a household spray, never anything acidic. Treat it the way you would treat an unsealed stone countertop, and it will outlast the room it is in.
Every globe carries its own veining. Yours will not look exactly like this one.
Why a Sphere Was the Hardest Possible Choice
And the only one that works in a corridor
A globe is the least forgiving form you can hand a stone carver. There is nowhere to hide a flat spot — the eye catches a wobble on a sphere instantly, the way it never would on a cone or a cylinder.
It is also the only shade that reads identically from every angle. A hallway is not a place where you stand still and admire a fixture; it is a place you walk past one. A sphere never presents a bad side.
Wall thickness is the second half of the answer. Too thick and the stone stays opaque and dead. Too thin and it goes brittle and the glow turns clinical. The Cordelia sits in the narrow band between the two — solid in the hand, luminous on the wall.
Getting the Arc to Sit Still
15 cm of projection, arrived at the slow way
The arm is a single brass tube bent into one continuous arc — up off the backplate, over the top, and down into the collar of the shade. It looks obvious now. It was not obvious.
The working sketch, laid out with the brass tube it eventually became.
Bend it too tightly and the sconce looks tense, hunched against the wall like it is flinching. Bend it too loosely and the globe drifts out and starts clipping shoulders in a hallway. The arc that survived puts the globe 15 cm / 5.9″ off the wall — far enough to be a gesture, close enough that a corridor stays a corridor.
04 — THE DETAIL
The Little Brass Ball at the Bottom
Here is the problem nobody states out loud. A heavy stone globe hanging off one side of a backplate is visually lopsided. The whole fixture wants to tip. Your eye feels it even when the screws are perfectly sound — it registers as a small, low-grade wrongness you cannot name.
The answer was a stem dropping below the plate, ending in a polished brass sphere. Same form, opposite material, opposite end. Cover it with your thumb in a photograph and the sconce immediately looks wrong. Uncover it and you stop thinking about it — which is the entire job.
Digital and paper running side by side, until the numbers stopped changing.
The variable that took longest was not the arc or the ball. It was the diameter of the globe relative to the height of the arm. A few millimetres larger and it reads as a streetlamp. A few smaller and the brass overwhelms it and the stone becomes a bead on a hook. The version that shipped resolves at 45 cm / 17.7″ high.
| Dimensions | L 25 × W 15 × H 45 cm L 9.8″ × W 5.9″ × H 17.7″ |
| Materials | Genuine natural alabaster; brass arm, backplate and counterweight |
| Installation | Hardwired to a standard wall junction box |
| Best for | Bathroom mirrors (in pairs) · hallways · bedsides |
Mount at roughly 165–170 cm / 65–67″ from the floor for a hallway — that puts the glow at eye level without shining into it. Flanking a mirror, centre each sconce at about 165 cm and space them at least 90 cm apart, so the light crosses your face from both sides instead of casting one hard shadow.
Questions, answered
Tap the + to expand each answer.
What size is the Cordelia Alabaster Globe Wall Sconce?
L 25 cm × W 15 cm × H 45 cm — that is L 9.8″ × W 5.9″ × H 17.7″. It projects 15 cm / 5.9″ from the wall, which keeps it clear of shoulders in a standard hallway.
Is it hardwired or plug-in?
Hardwired. The backplate mounts to a standard wall junction box. If you do not have existing wiring where you want it, an electrician can run it — worth doing, because the clean wall is half the point of this fixture.
How high should I mount it?
Around 165–170 cm / 65–67″ from the floor for hallways and general wall lighting. Flanking a bathroom mirror, centre each sconce near 165 cm and keep at least 90 cm between the pair.
What kind of light does the alabaster actually give?
Soft, warm and deliberately uneven. Because the light passes through the stone rather than bouncing off it, the shade brightens where the alabaster runs thin and glows amber where a vein crosses. There is no glare and no visible hotspot — the whole globe becomes the source.
Will my sconce look exactly like the photos?
No — and that is intentional. Genuine natural alabaster is quarried, not manufactured. Colour, veining pattern and the way each globe lights up vary piece to piece. The photographs show one Cordelia, not every Cordelia.
Can I hang them in pairs or in a run?
Yes, and it is the strongest way to use them. A pair flanking a mirror reads as symmetry; three or four spaced evenly down a hallway reads as rhythm. Because each globe is slightly different, a run gains texture rather than looking mass-produced.
How do I clean it?
Dry soft cloth, or barely damp. Alabaster is porous — skip household sprays, solvents and anything acidic. Wipe the brass with a dry cloth only.
Can it be customised?
Get in touch. We can discuss finish and specification for larger projects and trade orders.
- Posted in:
- Alabaster
- Behind the Design
- Brass
- Cordelia
- Lighting Guide
- Wall Sconce
