jet black nail polish glass bottle with timber cap
jet black nail polish hand swatch on medium skin tone, two hands next to each other
jet black nail polish hand swatch on medium skin tone, two hands, one above the other
jet black nail polish hand swatch on medium skin tone
jet black nail polish hand swatch on dark skin tone
jet black nail polish hand swatch on fair skin tone
jet black nail polish hand swatch on fair skin tone holding sienna bottle
Onyx
jet black nail polish glass bottle with timber cap
jet black nail polish hand swatch on medium skin tone, two hands next to each other
jet black nail polish hand swatch on medium skin tone, two hands, one above the other
jet black nail polish hand swatch on medium skin tone
jet black nail polish hand swatch on dark skin tone
jet black nail polish hand swatch on fair skin tone
jet black nail polish hand swatch on fair skin tone holding sienna bottle
Onyx

Onyx

Onyx is the black crème nail polish you will have on high rotation all year. It is ridiculously chic and has a super-inkey pigment for the jet-black nails of dreams.

Jet Black Crème 10ml – .34 fl oz. Nail Polish

*Due to not using nano-particles, Onyx may need 3 coats to achieve full coverage. A common ingredient used in darker colours is ‘nano-black’ code CI 77266 which is made up of nano-particles. This creates a more solid pigment however we feel it’s not worth the compromise to our health by using this ingredient. We hope you feel the same. xx

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Regular price $22.00
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  • Sienna nail polish is proudly ethically made in France, certified vegan
  • Our exclusive formula is a world first with no nano-particles
  • Everything we do is made to be as environmentally friendly

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Countless Happy Customers

Natural ingredients
Derived from Sugarcane, Cassava, Cotton and Corn.

Innovative, cleanest formula possible
Our exclusive formula is a world first with no nano-particles, no benzophenone 1 and none of the standard toxic ingredients everyone says no to!

World friendly products
From natural ingredients to the organic timber on our bottles; everything we do is made to be as environmentally friendly as possible.

  1. Start with a well prepped nail by using a single coat of either base coat or nail strengthener.
  2. Next, with your choice of colour, swipe one side of the brush on the inside of the bottle neck to remove excess nail polish.
  3. Place your brush with the drop of polish at the base of your nail, near the cuticle. Swipe it in a straight line from the base to the tip of the nail.
  4. Return to the base of the nail and gently swipe to each side of the initial stripe, covering the nail fully.
  5. Repeat the process on each nail.
  6. For full coverage apply two to three coats of colour.
  7. Finish with your choice of glossy or matte top coat.
  8. Voila! You achieved nail polish glory.

Ethyl Acetate (biosourced : derived from sugar cane), Butyl Acetate (biosourced : derived from sugar cane residue or manioc), Nitrocellulose (partially biosourced : derived from cotton), Adipic Acid/Neopentyl Glycol/Trimellitic Anhydride Copolymer, Acetyl Tributyl Citrate (partially biosourced : derived from corn), Alcohol (biosourced : derived from sugar cane), Isopropyl Alcohol, Stearalkonium Bentonite, Trimethylsiloxysilicate, N-Butyl Alcohol, Phosphoric Acid, Sucrose Acetate Isobutyrate, Diacetone Alcohol, Dimethicone, Acrylates Copolymer.

May contain (+/-) : Red 36 (CI 12085), Red 6 Lake (CI 15850), Red 34 Lake (CI 15880), Red 7 Lake (CI 15850), Iron Oxides (CI 77491), Red 30 (CI 73360), Titanium Dioxide (CI 77891), Iron Oxides (CI 77499), Yellow 5 Lake (CI 19140)

Nails that Radiate, the Healthy Way

Treating you and the planet with the utmost care

Natural ingredients, No Nasties

We use plant-based ingredients with minimal waste, offer 100% recyclable packaging, and run an in-house recycling program.

Vegan & Kind to Animals

Being vegan and cruelty-free covers all bases. No animal products in our polish, and definitely no animal testing, we’re committed to both!

Cleanest Formula Possible

The first of its kind worldwide, with no nano-particles, benzophenone 1, or any of the harmful ingredients everyone avoids.

By Nail Lovers, for Nail Lovers

40 researchers exclusively specialised in nail polish work their magic every day in our sustainable lab to produce your favourite Sienna shades.


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Frequently Asked Questions

Find the answers you’re looking for right here.

Orders are typically dispatched within 24 hours (business days) via Australia Post and DHL Express International. We aim to process orders within 1-4 business days, and delivery times may vary by destination. 

Domestic shipping is free for orders over $75, shipped through Australia Post. Shipping is free for orders over AUD $185, and AUD $55 for all other orders, shipped through DHL. USA orders can be made directly through our local website, and domestic shipping rates apply. 

Additional details are available on our dedicated shipping page.

The ingredients list is on each product page under the ‘Ingredients’ tab. You can also view it on the barcode label attached to the bottle. Simply peel the outside label to reveal.

Sienna is a conventional vegan nail polish formula. It offers a cleaner and more natural option compared to other brands.

Glitter has a significant environmental impact, and we stand against that. Microplastics from glitter have been documented to harm marine life, causing seabirds to die of starvation when ingested. Sienna was the first nail polish brand globally to ban glitter from production to address the environmental concerns.

Our nail polish allows air to permeate through the surface. Scientifically tested to ensure osmosis occurs all the way to the nail bed.

Please note that this osmosis is not visible to the naked eye, and
commonly used coffee paper saturation tests are not accurate. Osmosis happens through gently permeating the nail polish film.

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