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Home Shop Entry Level Fountain Pens Gravitas - Quark Zirconium Stone Washed Pocket Pen | New |
GravitasSKU: GP-FP-QK-ZI-3/BK-SN6

Gravitas - Quark Zirconium Stone Washed Pocket Pen | New |

€125,00 /
Tax not included. Shipping calculated at checkout.
4.61 (18 reviews)
Nib: Steel
Nib Size: Extra Fine
Gravitas - Quark Zirconium Stone Washed Pocket Pen | New |
€125,00 /
Nib: Steel
Nib Size: Extra Fine

 
 
Description

Introducing the updated Quark Zirconium pocket fountain pen that redefines compact convenience without compromising on performance. The new Zirconium Quark still maintains its use of zirconium for the cap, body and section featuring the same satin texture having a unique tactile feeling. Different from the first version, the new Quark Zirconium sports a blacked-out section, new ACME threads making it easy to post and securely capped without having the need for a rubber o ring.

Crafted to be the tiniest pen of its kind, the Quark transforms into a full-sized writing instrument when posted. Its lightweight design and ergonomically weighted section ensure a comfortable and effortless writing experience.

Featuring double-start cap threads, the Quark effortlessly unveils its nib with just 0.6 turns. When posted, the cap securely threads onto the back in a mere 2 turns. The 22mm-long section, ranging from 9.85mm to 9.0mm in width, is precision-engineered from zirconium material with micro-machined grooves for added grip.

Equipped with a Gravitas-production size 6 steel nib - silver color, compatible with Jowo No. 6 threads and abs plastic feeder, the Quark offers versatile writing options, including Extra Fine, Fine, Medium, Broad and Fine Flex.

This pen is eye-dropper friendly, capable of holding up to 1.5ml of ink or a standard international ink cartridge. Every Quark includes a complimentary attachment, designed for conveniently securing your item to a lanyard or any carrying accessory, ensuring ease and comfort in your collection.

Elevate your writing experience with the Quark Pocket Pen – where compact meets functionality.

Specifications:

- brand: Gravitas
- type: Fountain Pen
- color: Dark Grey
- body material: Zirconium
- cap type: Screw-cap
- filling mechanism: Eyedropper / Standard International Cartridge
- nib material: Steel
- nib size: Extra Fine, Fine, Medium, Broad, Fine Flex
- postable: Yes (screw to post)
- trim: Silver color
- length overall (closed): 85 mm.
- length overall (posted): 134 mm.
- body length: 82 mm.
- cap length: 58 mm.
- body diameter: 9,8 mm.
- cap diameter (without clip): 11 mm.
- weight (overall): 24 grams.
- body weight: 14 grams.
- cap weight: 10 grams.

Specifications

Brand: Gravitas
Model: Quark
Edition:
Color: Black
Body Material: Metal
Finish:

Cap Type:
Screw
Filling Mechanism:
Cartridge Only
Postable:
Yes
Trim Color:
Length Overall (Closed): 85 mm
Length Overall (Posted): 134 mm
Body Length (Uncapped):
82 mm
Body Diameter: 9.8 mm
Cap Diameter (Without Clip): 11 mm
Weight Overall: 24 g
Body Weight: 14 g

Customer Reviews

Based on 18 reviews
Write a review
78%
(14)
17%
(3)
0%
(0)
0%
(0)
6%
(1)
100.0
100.0
S
Scott Y
Quark, xf

Skipped so much I had to replace the nib unit with parts from my storage. Quite disappointing. The cap now screws on, I preferred the slip cap. It's faster. It's working now but I won't be spending any more money on gravitas.

A
Alex
Love the "zing"

To be fully honest, I bought the pen for the interesting material and for the awesome sound it makes. Ordered it in broad and as expected, it's a pleasure to write with. Will carry with it daily to impress and annoy my friends at work :)

C
C.B.
Perfect for even the tiniest pocket.

I picked up the Quark Zirconium with a fine nib to act as a counterpart to a Pocket Zirconium and ended up enjoying this tiny pen quite a lot more than I had expected to. While I typically gravitate towards medium nibs, I felt like the Quark was a perfect time to opt for a fine, and it made quite the impression.
I admittedly still prefer medium nibs for day to day use, I appreciate having the option to write just a bit finer And with the Quark, that option is always just a couple of seconds away. The threads for capping and posting are easy to start and feel very secure.
Then there's that splendid ringing you can get out of this little pen. It's something so simple but it always brings a smile to my face.

F
Frank
A good pen as well as good customer service

I don't think I can edit my previous review but I will explain the context briefly. When the Quark arrived it was just as I expected except for an odd issue where the nib was inconsistantly feeding ink onto paper. After leaving a review, Emy contacted me and started working to resolve the issue. In the end, a replacement nib unit was sent to me in addition inside another order I had placed, works great. It was a bit of a pain in the neck to deal with but Emy was very professional and was looking to make things right.
That being said, I'm pretty happy with the Gravitas Quark. With it being a pocket pen, it's nice to carry with me at work for any writing/notes I have to take. Feels nice in the hand, threads in the cap as well as the threads on the end for posting take about one rotation.

User picture User picture User picture User picture
L
Leandros
Gravitas Quark - An excellent pen

This is my first pocket pen and I was quite skeptical if it would work for me. I have to admit that I was pleasantly surprised. The size of the posted Quark is close to the size of an unposted full size pen. Zirconium being a relatively heavy metal gives the pen a nice substantial feel despite the overall small dimensions. The grip section is really comfortable and the nib is excellent. The construction quality is superb.
Last but not least I would rate the buying experience from Pen Venture with A+++ and I definitely recommend them.

123
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© 2026 Pen Venture - Passion Virtuous,

★ Reviews

Let customers speak for us

883 reviews
Write a review
92%
(813)
6%
(54)
1%
(6)
1%
(5)
1%
(5)
844
49
J
Gravitas - Vac 2.0 Grade 5 Titanium | Stone Washed
Juris
<3<3<3

I love this pen. As usual the Gravitas did not disappoint me. Perfect machining, absolutely perfect fit and finish.. this pen is another masterpiece. I love writing with it, I love the materials, and I love how much ink it holds. just pure Gravitas, what else to say.

W
Gravitas - Vac 2.0 Aluminium | Black
W.
Another Great Gravitas Pen

I ordered this pen even though I’ve had some issues with two of my six Monster pens—which amounts to a failure rate of nearly 30%. One of my Monsters (black aluminum) suddenly started leaking after three months of regular use (with Artisan Pastellier Rose Cyclamen ink; it still leaks in small amounts, even though I haven’t used that ink in it for months and am now using the fountain pen with GvFC Viper Green; otherwise, the pen works reliably). Unfortunately, two service requests regarding this issue went unanswered.

The other one (TiSinX titanium) is now, unfortunately, completely unusable, as every time I fill it, large amounts of ink immediately ooze out in thick drops from the same spot (though this could be due to using Diamone Desert Rose—I didn’t initially know that such inks might cause problems). I may contact Pen Venture at a later date regarding the purchase of a replacement ink reservoir (if possible with Ultem).

I haven’t had any problems so far with the Ultem Monsters or the Gravitas Exclusive Rainbow Skittle Monster.

The Vac 2.0, which is what this review was actually supposed to be about, is another great pen. Unfortunately, the Diamine Lady Grey ink I bought along with it seems much too dry for this pen, so I screwed in the gold nib from my Gravitas x Kyuseido Kakari, and now it writes like a dream; ironically, the original nib now writes just as beautifully in my Ultemate Vac - so I guess I have to review the new steel nib separately.

The Kraken filling mechanism works extremely well again and feels almost a bit more powerful in this pen than it does in the Monster; and the new ink window is a joy as well.

It's extremely well balanced and although I very much enjoy the girthier (and heavier) monster, fast note taking is kind of more comfortable with this pen—although, purely for aesthetic reasons, I actually like the flat ends of the Monster a little better.

However, there’s a minor flaw (which definitely isn’t due to the new gold nib, since it also occurred with the original nib) that happens when the ink reservoir is full and you screw the Kraken mechanism shut. Sometimes a large drop falls onto the paper then, but I suspect this can be prevented by simply not letting the reservoir get completely full.

That aside, the pen is a pure delight.

The broad nib I orderd it with is pure delight as well. It's nicely soft and writes very consistently with my (fairly standard, I guess) 50° writing angle. The line width is very consistent, which is a nice experience, given that many broad nibs these days have stub-like characteristics. Interestingly, this nib has this kind of character when using it in reverse for very, very small margin notes—something I haven't come across before with round-ground nibs. I kind of like it.

All in all another great and beautifully designed pen - but only time will tell if it's prone to the same problems as some of the Monsters.

The ordering process and shipment was smooth and seamless as always with pen venture and I received my ordering within just a few days. Emy added a kind handwritten note, a Monster maintenance tool and vial of silicon oil.

That creates a kind of personal shopping experience—which is something, also given that the store appears to be expanding quite rapidly.

User picture User picture
I
Fifty4T - Titan Ultem
IanM
Fifty 4T Titan Ultem - First Impressions

Emy has just sent me the 50/40 Titan Ultem. It’s a very well balanced pen made from a variety of rugged materials. This pen will outlast me, safe to say. The first and continuing impression the pen gives is its superb machining. The fit and finish is of the highest order comparable to artisanal products made in limited numbers by engineer-designers: like musical instruments, pocket knives, tobacco pipes and wristwatches. There is no feature or detail in this pen that distracts from my pleasure in using it. I respond to the common critiques of the 50/40 in the following way: (1) There is no clip. This is true. That this is a shortcoming is not true. I don’t need a clip. My writing surface is flat so it doesn’t roll off and the pen never leaves the studio so I don’t put it in my shirt pocket. (2) The Ultem material is the color of urine. I don’t see it that way. It’s transparent canary and provides a lively contrast to the titanium. If you prefer, the clear and smoked options are also available.(3) The nib should be gold. I disagree. This steel nib is comparable to premium Swedish surgical steel. There’s nuance and flexibility in its response. And the discrete etched logo is the only product marking on the entire pen (with the exception of the pen number out of a series of 250 at the bottom of the cap). (4) It’s too expense. That is an opinion not an argument. I had no problem paying the €640.

G
Gravitas - Pocket Titanium Grade 5
Geoff Goldsmith
Beautiful pocket pen.

I’m really happy with this pen. The machining on the body is really nice and the tactility of the grip is amazing. It also looks lovely.
If I had any criticism it would be that the cap doesn’t post as securely as some pocket pens but once you get used to it is perfectly useable and doesn’t affect my enjoyment of the pen.

S
Gravitas - Monster Aluminium | Black
S
Complete pile of shite

Bought a Gravitas Monster. Kept in pen sleeve in padded case. Used carefully. Treated carefully. Filled twice. Noticed ink all over my hand. No obvious problem. When home I emptied the pen and notice a thin crack in the barrel at the "turning knob" end, just before the aluminium. Now unusable. Ink seeping out. Complete waste of money. Complete crap. Either desire flaw, or poor materials or both. Watch out. Will never buy another Gravitas POS, nor from this retailer again.

123
Review picture
W.
Another Great Gravitas Pen

I ordered this pen even though I’ve had some issues with two of my six Monster pens—which amounts to a failure rate of nearly 30%. One of my Monsters (black aluminum) suddenly started leaking after three months of regular use (with Artisan Pastellier Rose Cyclamen ink; it still leaks in small amounts, even though I haven’t used that ink in it for months and am now using the fountain pen with GvFC Viper Green; otherwise, the pen works reliably). Unfortunately, two service requests regarding this issue went unanswered.

The other one (TiSinX titanium) is now, unfortunately, completely unusable, as every time I fill it, large amounts of ink immediately ooze out in thick drops from the same spot (though this could be due to using Diamone Desert Rose—I didn’t initially know that such inks might cause problems). I may contact Pen Venture at a later date regarding the purchase of a replacement ink reservoir (if possible with Ultem).

I haven’t had any problems so far with the Ultem Monsters or the Gravitas Exclusive Rainbow Skittle Monster.

The Vac 2.0, which is what this review was actually supposed to be about, is another great pen. Unfortunately, the Diamine Lady Grey ink I bought along with it seems much too dry for this pen, so I screwed in the gold nib from my Gravitas x Kyuseido Kakari, and now it writes like a dream; ironically, the original nib now writes just as beautifully in my Ultemate Vac - so I guess I have to review the new steel nib separately.

The Kraken filling mechanism works extremely well again and feels almost a bit more powerful in this pen than it does in the Monster; and the new ink window is a joy as well.

It's extremely well balanced and although I very much enjoy the girthier (and heavier) monster, fast note taking is kind of more comfortable with this pen—although, purely for aesthetic reasons, I actually like the flat ends of the Monster a little better.

However, there’s a minor flaw (which definitely isn’t due to the new gold nib, since it also occurred with the original nib) that happens when the ink reservoir is full and you screw the Kraken mechanism shut. Sometimes a large drop falls onto the paper then, but I suspect this can be prevented by simply not letting the reservoir get completely full.

That aside, the pen is a pure delight.

The broad nib I orderd it with is pure delight as well. It's nicely soft and writes very consistently with my (fairly standard, I guess) 50° writing angle. The line width is very consistent, which is a nice experience, given that many broad nibs these days have stub-like characteristics. Interestingly, this nib has this kind of character when using it in reverse for very, very small margin notes—something I haven't come across before with round-ground nibs. I kind of like it.

All in all another great and beautifully designed pen - but only time will tell if it's prone to the same problems as some of the Monsters.

The ordering process and shipment was smooth and seamless as always with pen venture and I received my ordering within just a few days. Emy added a kind handwritten note, a Monster maintenance tool and vial of silicon oil.

That creates a kind of personal shopping experience—which is something, also given that the store appears to be expanding quite rapidly.

Gravitas - Vac 2.0 Aluminium | Black