Onyx Gemstones | Kernowcraft

About Onyx

The onyx gemstone is a variety of the microcrystalline quartz, chalcedony and is one of the most popular gemstones for jewellery making. It has a black base and white upper layer but most onyx gemstones are completely black. Found worldwide it is formed by the deposition of silica in gas cavities in lava. Onyx is a common gemstone and often found in Italy, Mexico, United State, Russia, Brazil and South Africa. It has a hardness of 7 on the Mohs scale.

Jewellery Making With Onyx

Onyx is a great gemstone to work for creating dramatic and statement designs. It works well for both men's and women's jewellery and works brilliantly with gold settings.

At Kernowcraft, we have a beautiful range of onyx gemstones for your jewellery designs. This includes onyx cabochons available in round, oval, teardrop, marquise, rectangle and square. We also have lovely black onyx donuts, top drilled hearts, onyx round half drilled beads and a range of onyx beads. We also have a great selection of green onyx, which is great for adding a pop of colour to your designs.

Shop our range of jewellery settings for cabochons or our range of beading threads and jewellery findings to get making! We also have an extensive range of silversmithing supplies for all your needs. Explore our beginner's jewellery making kits with step by step instructions for inspiration or check out our jewellery making tutorials on silversmithing, wire-wrapping, beading, stone setting, texturing and more.

Onyx Gemstone Meaning

Onyx is said to be a strength-giving gemstone with properties such as support in difficult or confusing circumstances. Onyx is also thought to hold memories of the things that have happened to the wearer.

Have a question about our gemstones? Contact our friendly team today

What Our Customers Say...

Claire

I just wanted to say a big thank you for the beautiful sapphires that arrived today. Hannah picked out just what I wanted and I’m over the moon with them.

Jenny Kirkwood

Love the service you get and appreciate the range of products on offer. I just used the alligator tape for the first time and found myself asking - where have you been all my life?

Janice Scragg

Your website is easy to use, your products excellent, nice friendly service on the phone and delivery quick, excellent. Thank you and well done Kernowcraft. Gold star!

Denise Mountain Pike

I recently ordered a couple of replacement stones from you and I'd just like to say how happy I am with my purchase and very impressed with the friendly helpful service you gave. Thank you very much.

Claire Hall

Kernowcraft is my go to for all my gemstones! Their stones are the first ones I show when offering my clients stone choices and I can't recommend their customer service enough! This is a company that cares!

Helen

Just wanted to say thank you for picking such beautiful stones for my order. I'm halfway through making a ring for my daughter and the rose cut rainbow moonstones are particularly yummy. Thank you!

Hayley Meredith

I just wanted to say thank you for the amazing service from Kernowcraft. I find your website easy to navigate, products good quality and the delivery is second to none!

Rhiannon Piper

The opal I received is absolutely amazing and just perfect. Its such a beautiful stone and I tried it with my wedding dress yesterday and its just set it off so well.

April Luescher

Beautiful quality and colours - I rarely buy semi-precious stones anywhere else these days. Very helpful, superb service, speedy delivery. What more could anyone want?

Sarah Tiley

Whenever I feel unsure as to where to purchase any stones or jewellery requirements I always go back to what is familiar. Thank you Kernowcraft for being true to your customers.

Julia Schofield

I’ve used Kernowcraft as a supplier for findings and pearls since beginning my business 8 years ago, because I know I can absolutely rely on the quality I get. The service is pretty impeccable too.

Frank Wilson

I have grown as a jewellery maker over the last year or so due to the encouragement the team have given me - they are all experienced jewellery makers or keen crafters. They have helped to guide me through my inventory, offered helpful tips and advice on all manner of silver working.

Lenna

Hi, just a quick email to thank you for my cross and chain - I love it. What a speedy service - ordered it yesterday and wearing it tonight. Thank you very much.

Jill Hammersely

I just wanted to say a massive thank you to the team, particularly the ladies that helped me yesterday. Delivery took less than 24hrs, that's amazing. The quality of both cabochons and settings are stunning.

George Inglis

Great looking website, one of the best I've seen and used. Good search function, good range of products, good prices and great advice for jewellery makers of all abilities. All-in-all a great site and one I'll use again and again.

Eve

The stones are excellent quality, and the special request I put in for dark citrines and paired malachites has been met perfectly. I am delighted with Kernowcraft, and will be back!

Daniel Coe

The customer service I have received from you and the help has been second to none. If only all companies were so helpful and understanding that i am a complete newbie. The retail world would be a better place.

Joel Martin

Great, easy to navigate website with wonderful clear photographs. I look forward to receiving my order... it's going to be like Christmas!

Frank Wilson

It is always a joy to deal with your Company and your hints and tips always help me to improve my skills and encourage my interests. Thank you for caring about us small enthusiastic silversmiths!

Lauren Jodie Piercy

Beautiful gemstones and a lot of choice. Running competitions and being interactive as well really sets them apart. Keep up the interesting content.

Lydia Farrow

Just to say that I have always had the best possible results for every order - however small and all your products are of excellent quality.

Catriona

Thank you for my recent order as I'm blown away by all the lovely pieces. I don't really know what to start work on first. Thank you for supplying top quality items on a easy to use website.

Gloria Williams

I just came across your online shop and my first reaction was wow! It has everything i need to carry on with my jewellery making. I've seen things that i have been looking for and couldn't find in so many other shops!

Mihaela Ciubotaru

I am very happy with my products... it is wonderful to have a reliable source of materials and gems with a fast delivery and a lot of tips on how to use the tools we buy.

Lynn Carson

I bought the sand dollar charm to make a holiday bracelet. It’s really lovely, subtle and pretty detail. Perfect piece and exactly as described.

Vivienne Sadler

Always too many temptations, but a joy to look through. Thank you for such good service. I have to be very strict with myself when I visit your website!

Jaquie

It can be difficult to order gemstones online - no such worries with Kernowcraft - you really do care about your products & clients and it shows.

I added a special request for moonstones with strong blue/green flashes and received 3 briolettes which were exactly that - some of the prettiest moonstones I’ve seen. Thank you!

Kim Thomson

I have been using Kernowcraft since 1997 and still regularly recommend them to all my students.

Helen Bowles

I felt compelled to write to you, as I'm so impressed with your quick service! I've been a Kernowcraft customer for years and have never had anything but reliable, efficient service from you.

Catherine Warwick

Just received my order that I placed only yesterday. I wanted to say thank you! I am delighted with the choice of cabochon, setting and books. Now I have to read up on how to set it! FABULOUS SERVICE - Thank you!

Marshal

Thank you to the lady who went to a great deal of trouble to find a very small opal that fitted a bezel cup. The work is now complete and looks very nice - my wife is delighted with the result.

Deborah Roberts-Barter

I have sent a couple of email enquiries today, which have been really quickly answered. This customer service is what made me order with you straight away!

Christine Wood

Just want to say a very big thank you for your quick delivery and excellent service. The stones I ordered arrived this morning, the quality and price are second to none. I was delighted with my purchase. Thank you so much.

Maggi Henman

I’ve just had my first order from you and I am so pleased with the fast delivery and the quality of the products. The satin cords and the findings really finished off my ceramic jewellery.

Dorota Todd

I just wanted to say how impressed I am with the quality of pearls in my recent order! Thank you so much for taking time and matching them into pairs, it's very appreciated. Thank you and I am definitely going to buy at your store in the future.

Onyx

Black Onyx Cabochons

Black Onyx Rose Cut Cabochons

Black Onyx Flat Plate Cabochons

9ct Gold Black Onyx Flat Plate Cabochons

Black Onyx Bullet Shaped Cabochons, Approx 5mm

Black Onyx Round Half Drilled Beads - Various sizes

Black Onyx Half Drilled Faceted Beads - Approx 6mm Round

Black Onyx Agogo Pendant

Black Onyx Faceted Round Beads - Approx 3mm

Black Onyx Faceted Rondelle Beads - Approx 4x2mm

Black Onyx Round Beads - Various sizes

Green Onyx Faceted Drop Briolette Beads - Approx From 6mm, Pack Of 10 Beads

Green Onyx Faceted Heart Briolette Beads - Approx From 9mm

Green Onyx Faceted Rondelle Beads - Approx 3.5x3mm

Ready To Wear Bezel Set Faceted Briolette Pendants

About Onyx

Jewellery Making With Onyx

Onyx Gemstone Meaning

What Our Customers Say...

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