TWSBI Diamond 580ALR Caribbean Fountain Pen - Onyx TrimDive deeper into your thinking The TWSBI Diamond 580ALR Caribbean with Onyx trim combines a vibrant teal blue body with dark black accents that shift the mood away from playful and towards focused. The darker trim pushes the colour deeper into the blue spectrum, making it easy to pair with everything from turquoise and navy through to warm amber inks. Built on the reliable Diamond 580ALR platform, it combines high ink capacity, a smooth wet stainless