Authorized Platinum Retailer

Platinum Curidas Stone Sphene Fountain Pen

Color: Sphene  · Ref: PKN-9000-41-F
$90
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Color: Sphene
Nib Size
In stock. · Ships next business day
Authenticity
Authorized Platinum dealer
Warranty
Official Platinum warranty
Shipping
DHL Express - with tracking
Returns
30 days from delivery

Overview

Platinum Curidas Stone Sphene Fountain Pen.

Platinum Curidas retractable fountain pen in green: a retractable-nib mechanism with no cap. With the brands own Nib Pocket system that seals the nib in an elastomer chamber to protect it from drying out between uses. The nib advances and retracts with a push button at the back of the body: one press brings it out to write and another retracts it and closes the Nib Pocket chamber. Filled by cartridge / converter. Official Platinum product, backed by the manufacturer's warranty.

To celebrate the 60th anniversary of Platinum's first retractable fountain pen (1965), the limited edition Curidas Stones, inspired by precious stones, is now available. With pearlescent and iridescent finishes that change depending on the light, these fountain pens offer a dynamic and sophisticated design, perfect for modern writers and collectors.

At a glance
  • Capless retractable mechanism ready with one click
  • Nib Pocket system that seals the nib between uses
  • Platinum nib in size M (medium)
  • Filled by cartridge / converter
  • Body in green

Specs

Material
Resin
System
Nib Pocket
Country of manufacture
Japan
Mechanism
Type Capless retractable
System Nib Pocket
Nib
Brand Platinum
Size M (medium)
Filling
System Cartridge / Converter
Color
Main Green
General
Warranty 3 years
Country of manufacture Japan
Body
Material Resin
Trim Chrome

Questions & Answers

How does it open with no cap?

With a push button at the back of the body: one press brings the nib out and another retracts it.

Does the nib dry out with no cap?

The Nib Pocket system seals it in its own elastomer chamber when retracted, to protect it from drying out between uses.

What filling system does it use?

It is filled by cartridge / converter.

What warranty does it carry?

It includes 3 years of official Platinum warranty.

Is it the same system as the Slip and Seal cap on other Platinum models?

No; Slip and Seal belongs to the screw-cap models, here the seal is handled by the Nib Pocket system, specific to the retractable mechanism.

How long has Platinum been making retractable fountain pens?

Since 1965 which is the year of the first retractable fountain pen Platinum made.

Still have questions? Talk to a specialist

Verified Reviews

FAQ

Yes, we are an Official Platinum Authorized Dealer, and an authorized dealer for every brand we carry.

With over 15 years in the luxury market, we guarantee the authenticity and quality of every piece we sell.

Your order arrives brand new in its original Platinum packaging, with all official documentation and the Platinum warranty card, stamped and dated by us.

The warranty covers manufacturing defects. It doesn't cover normal wear and tear or accidental damage — and on watches, it doesn't cover straps, bracelets, or batteries.

Questions about a specific piece? Our specialists are happy to help.

Please contact our team.

You'll find availability on every product page, right above the Add to Cart button. Here's what each status means:

"In stock, ships within 24 hours" or "Only X units left" — the item is in our warehouse and ships the next business day after you order.

"In stock, ships within X days" — the item is held at our secondary warehouse. We allow a few days to inspect and authenticate it before it ships.

"Check delivery date" — the item is available to order, but we confirm the exact date with the brand. As soon as you order, we contact the manufacturer and email you an estimated delivery date.

Need something by a specific date? Tell us and we'll check before you buy. [Contact our team →]

Yes — free DHL Express shipping on all US orders of $250 or more.

  • Orders from $150 to $249.99 ship DHL Express for a flat $9.90
  • Orders under $150 ship DHL Express for a flat $19.90

Every order ships with a tracking number, so you can follow your package every step of the way. Shipments are fully insured and delivered by DHL Express with signature required.

Most in-stock orders arrive within 2–3 business days, depending on your location.

No, the price you see at checkout is the price you pay — nothing else.

The price you pay at checkout is the final price of the item delivered to your address.

DHL will never ask you for a payment on delivery, and no surprise invoice arrives afterward.

No handling charges, no processing fees, nothing added at the door.

We accept all major credit and debit cards, Apple Pay, Google Pay, PayPal, and bank wire transfer.

  • Credit and debit cards — Visa, Mastercard, American Express
  • Apple Pay and Google Pay — one-tap checkout, nothing to type
  • PayPal — with PayPal Buyer Protection on every purchase
  • Bank wire transfer — often the preference on higher-value orders

Every transaction is fully encrypted, and we never store your card details.

Financing. Choose PayPal at checkout and you may be offered the option to split your purchase into payments or finance it over time, including interest-free plans on qualifying orders. You'll see exactly what's available for your order before you confirm — plans, terms, and eligibility are set by PayPal and subject to their approval, with no obligation to take it.

Paying by wire, or buying more than one piece? [Contact our team →] and we'll take care of you personally.

You have 30 days from delivery to return your order.

How returns work. Just let us know and we'll email you a prepaid DHL Express return label — you never have to arrange a shipment or pay anything up front. The return shipping cost is deducted from your refund. If the item arrived damaged or wasn't what you ordered, the return is on us.

Your refund options.

  • Store credit (issued as a gift card) — processed almost immediately once your return reaches us
  • Refund to your original payment method — typically 5–10 business days to appear, depending on your bank or card issuer

To qualify for a full refund, the item must:

  • Be unused and in perfect condition, with no signs of wear
  • Include its original packaging and outer box
  • Include all original documentation, accessories, and the warranty card

Not sure whether something qualifies? Ask us before you ship it back — we'll tell you straight. Contact our team.

TALK TO A SPECIALIST

Still have questions?

Our specialists are here before and after you buy — no pressure, no obligation. Authorized dealer, official warranty, and guaranteed authenticity on every piece.