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The Golden Ratio is a mathematical ratio often found in nature
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monster red sheen and blue shimmer
The super smooth and buttery nib is a joy to write with
During the manufacturing process
TWSBI Obsidian Fountain Pen Nib Size:Fine The Golden Ratio is aThe TWSBI Obsidian combines aesthetic refinement with mechanical precision, showcasing a distinctive dark grey and black marbled acrylic resin barrel accented by rose gold plating throughout. Its rose gold plated stainless steel nib provides writing characteristics aligned with TWSBI's 580 specifications, delivering reliable performance across various writing styles. The pen features TWSBI's signature piston filling mechanism for efficient ink
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