Product Info
TWSBI Diamond Mini – Rose Gold Fountain Pen | Compact Piston Filler
Looking for a compact fountain pen that doesn’t compromise on luxury or performance? The TWSBI Diamond Mini Rose Gold Edition delivers all the functionality of a full-sized fountain pen in a stylish, portable form — now with beautifully upgraded rose gold accents.
Designed as a smaller sibling to the popular TWSBI Diamond 580, the Diamond Mini features a clear, faceted barrel that showcases ink colors beautifully and lets you easily monitor your ink levels at a glance. This version is finished with warm rose gold trim, adding a touch of sophistication to your everyday writing tool.
This is a true piston filler fountain pen, meaning no cartridges or converters are needed. Just dip the nib in ink and twist the piston knob to fill — a satisfying process that results in a generous ink capacity.
Despite its compact appearance when capped (similar in height to an iPhone 5), the cap can be posted securely onto the back for a comfortable, full-size writing experience — ideal for everyday carry.
Nib sizes available: Extra Fine (EF), Fine (F), Medium (M), Broad (B), and Stub 1.1
Note: Ink not included.
Quick Nib Size Guide (for better customer experience and voice search)
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EF (Extra Fine): Great for small handwriting
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F (Fine): Ideal for daily writing tasks
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M (Medium): Balanced width for slightly larger writing
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B (Broad): Bold and expressive, perfect for headers or signatures
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Stub 1.1: Creates a calligraphy-like effect for cards and invitations
Whether you're a seasoned collector or searching for the best piston filler fountain pen for everyday use, the TWSBI Mini Rose Gold combines style, practicality, and performance in one beautifully engineered writing instrument.