Does this pen come with ink or a converter?

The pen ships with the nib installed but does not include cartridges or a converter. It accepts standard international cartridges and converters, which are widely available.

How does the polished aluminum finish hold up to daily use?

Polished aluminum will show fingerprints, minor scratches, and handling marks over time. This is typical for the material and many users consider it part of the pen's character as it ages.

What is the difference between the fine and medium nibs?

Fine nibs produce a thinner line suitable for small handwriting or detailed work. Medium nibs lay down more ink and work well for everyday writing and signatures. Both are steel and hold their shape under normal pressure.

Is this pen heavy compared to plastic fountain pens?

Yes, the aluminum barrel weighs more than resin or plastic pens. The added weight helps with balance and control but may feel tiring during very long writing sessions if you prefer lightweight instruments.

Black Forest Pens Rhombus Fountain Pen - Polished Aluminium

The 3-second version

Rhombus pattern milled into aluminum barrel for secure grip
#5 steel nib available in fine or medium width
Polished aluminum construction with visible machining detail
Polished finish shows fingerprints and wear
Aluminum feels cool to the touch
Heavier than resin or plastic pens

Why it's on GiftsFeed

Precision-milled aluminum fountain pen with geometric grip

Most metal fountain pens rely on smooth barrels and assume your grip will hold through fatigue or ink on your fingers. This one machines texture into the structure itself, so the grip doesn't depend on dry hands or a fresh finish. The rhombus facets give you something to hold onto without adding rubber sleeves or knurling that collects dust. It's the difference between a pen that looks industrial and one that borrows its manufacturing methods from parts that have to perform under load.

Good gift when

People who prefer metal pens over resin or wood
Writers looking for a secure grip during long sessions
Anyone drawn to industrial design and visible machining
Daily fountain pen users who value durability

Skip it if You prefer pens that stay pristine—polished aluminum shows handling marks and will develop a worn finish with regular use.

Specs

Material: Polished Aluminum
Nib: #5 steel
Nib Sizes: Fine, Medium
Ink System: Standard international cartridge or converter
Made In: Germany

What's included

Rhombus Fountain Pen
#5 steel nib (fine or medium)

If you're giving it

No sizing to guess

Nib width is a personal preference; medium suits most writing styles.

The details

The Rhombus Fountain Pen starts with a single piece of aluminum and removes material until a repeating diamond pattern wraps the entire barrel. Each facet is cut with the same tooling used for mechanical components, giving you edges you can feel and a surface that won't slip when your hand is tired or the pen is inked.

The polished aluminum finish shows fingerprints and minor scuffs over time, developing the kind of patina metal objects earn through use. The barrel weighs enough to balance in your hand without fatigue, and the metal stays cool to the touch even during long writing sessions.

A #5 steel nib ships in either fine or medium width. Steel holds its geometry under normal writing pressure and requires less maintenance than softer nib materials. The nib takes standard international cartridges or a converter for bottled ink.

Every pen is machined and assembled in Germany. The rhombus pattern isn't decorative overlay—it's integral to the barrel, cut before finishing. The result is a writing instrument that feels more like a precision tool than a luxury accessory, and one that will look more interesting after a year of daily carry than it does new in the box.

Galen Leather

Black Forest Pens Rhombus Fountain Pen - Polished Aluminium

German-made metal barrel, #5 steel nib, rhombus-cut surface

$155at galenleather.com

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Buy from Galen Leather

Ships and sold by Galen Leather. About this merchant

The 3-second version

Rhombus pattern milled into aluminum barrel for secure grip
#5 steel nib available in fine or medium width
Polished aluminum construction with visible machining detail
Polished finish shows fingerprints and wear
Aluminum feels cool to the touch
Heavier than resin or plastic pens

Cheaper alternatives

Questions

Does this pen come with ink or a converter?: The pen ships with the nib installed but does not include cartridges or a converter. It accepts standard international cartridges and converters, which are widely available.
How does the polished aluminum finish hold up to daily use?: Polished aluminum will show fingerprints, minor scratches, and handling marks over time. This is typical for the material and many users consider it part of the pen's character as it ages.
What is the difference between the fine and medium nibs?: Fine nibs produce a thinner line suitable for small handwriting or detailed work. Medium nibs lay down more ink and work well for everyday writing and signatures. Both are steel and hold their shape under normal pressure.
Is this pen heavy compared to plastic fountain pens?: Yes, the aluminum barrel weighs more than resin or plastic pens. The added weight helps with balance and control but may feel tiring during very long writing sessions if you prefer lightweight instruments.