How heavy is this pen compared to plastic fountain pens?

The weight is not specified in the source data, but stainless steel construction means this will be noticeably heavier than resin or plastic pens. The weight helps the pen do some of the work during writing, though it may feel tiring if you're used to very lightweight instruments.

Will the milled pattern wear smooth over time?

Milled stainless steel is highly durable. The rhombus facets are cut into the metal rather than applied as a coating, so normal use and handling will not smooth them out. The texture should remain consistent over years of regular use.

Can I use this pen with bottled ink?

Yes, if you use a converter. The pen accepts standard international converters that fit number-five nibs, allowing you to fill from any bottled fountain pen ink. Without a converter, you're limited to cartridges.

Black Forest Pens Rhombus Fountain Pen - Stainless Steel

stainless steel

The 3-second version

Milled rhombus pattern creates secure grip and visual texture
Stainless steel construction machined in Germany
Standard number-five steel nib in fine or medium width
Nib choice required at purchase
Heavier than plastic pens
Ink not included

Why it's on GiftsFeed

Precision-machined stainless steel fountain pen with milled geometric grip

Most metal fountain pens are either slick cylinders that slip during long writing sessions or heavily ornamented pieces too precious for daily use. The Rhombus splits the difference: the milled facets give you real purchase without requiring a rubberized grip section, and the all-steel build means you can toss it in a bag without worry.

The machining quality makes the case. Every rhombus edge is crisp, the threads are clean, and the nib seats flush. If you want a pen that works as a tool rather than as a statement piece, this is what careful manufacturing looks like at the sub-luxury tier.

Good gift when

Writers who prefer metal pens with texture over smooth finishes
Fountain pen users looking for durable everyday carry
People who value straightforward German manufacturing
Anyone transitioning from disposable to refillable pens

Skip it if Steel nib and mid-weight build—if you want flex, line variation, or a very light pen, look elsewhere

Specs

Material: Stainless steel
Nib: #5 steel
Nib sizes: Fine, Medium
Made in: Germany

What's included

Fountain pen with cap

If you're giving it

No sizing to guess

Nib width is a preference choice; medium suits most everyday writing.

The details

The Rhombus is a metal fountain pen built around a signature design detail: its barrel is covered in precisely milled diamond-shaped facets that give you something to grip and a surface that catches light from every angle.

The construction is straightforward stainless steel throughout. The body is machined rather than stamped, and the rhombus pattern isn't decorative—it creates edges and recesses that keep the pen steady in your hand during long sessions. The finish stays consistent across the cap, barrel, and clip.

Inside sits a number-five steel nib available in either fine or medium width. It's a standard cartridge-and-converter system, so you're not locked into proprietary refills. The cap posts securely on the back when you're writing, and the overall weight falls in the range where the pen does some of the work without tiring your hand.

Black Forest Pens manufactures this in Germany using machining processes that leave crisp edges on every facet. The result is a pen that looks and feels deliberate—nothing wobbly, nothing approximate. If you prefer pens that have some heft and texture rather than smooth lacquer, this delivers both without unnecessary ornament.

Galen Leather

Black Forest Pens Rhombus Fountain Pen - Stainless Steel

German-made writing instrument with textured rhombus-pattern barrel and steel nib

$206at galenleather.com

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Buy from Galen Leather

Ships and sold by Galen Leather. About this merchant

The 3-second version

Milled rhombus pattern creates secure grip and visual texture
Stainless steel construction machined in Germany
Standard number-five steel nib in fine or medium width
Nib choice required at purchase
Heavier than plastic pens
Ink not included

Cheaper alternatives

Questions

Does this pen come with ink cartridges or a converter?: The merchant description does not specify what is included beyond the pen itself. It uses a standard cartridge-and-converter system, so you can use any standard international cartridges or converters that fit a number-five nib.
How heavy is this pen compared to plastic fountain pens?: The weight is not specified in the source data, but stainless steel construction means this will be noticeably heavier than resin or plastic pens. The weight helps the pen do some of the work during writing, though it may feel tiring if you're used to very lightweight instruments.
Will the milled pattern wear smooth over time?: Milled stainless steel is highly durable. The rhombus facets are cut into the metal rather than applied as a coating, so normal use and handling will not smooth them out. The texture should remain consistent over years of regular use.
Can I use this pen with bottled ink?: Yes, if you use a converter. The pen accepts standard international converters that fit number-five nibs, allowing you to fill from any bottled fountain pen ink. Without a converter, you're limited to cartridges.