PHOTOS ARE OF ACTUAL PRODUCT FOR SALE
Natural Black Onyx Gemstone Cabochons | Polished Black Stone for Rings & Pendants
Natural Black Onyx Gemstone Cabochons | Polished Black Stone for Rings & Pendants
Shipping Policy
Flat 5 usd shipping worldwide (add unlimited stones). We now offer DDP(Duty Paid) shipping to the USA. Ensuring zero extra tariffs. NO surprise charges on delivery.
Processing Time:
All orders are processed within 1-3 business days approx. Orders are not shipped or delivered on weekends or holidays. If we are experiencing a high volume of orders, shipments may be delayed by a few days. Please allow additional days in transit for delivery. If there will be a significant delay in the shipment of your order, we will contact you via email.
Shipping Rates & Delivery Estimates:
Shipping charges for your order will be calculated and displayed at checkout. Delivery times vary based on the shipping method chosen and the destination.
Standard Shipping: 10 to 14 business days approx (postals, xpressbees)
Express Shipping: 5 to 9 business days approx
Please note that delivery delays can occasionally occur, especially during peak seasons.
PRICE is flat 5 USD for regular shipping (add as many stones as you want in the order)
PRICE is flat 25 USD (express)
Regular Shipping ( 10 to 14 working days approx, Fully Trackable)
Tracking number provided
Express Shipping ( 5 to 9 working days approx., Fully Trackable) Tracking number provided
Shipment Confirmation & Order Tracking:
You will receive a Shipment Confirmation email once your order has shipped, containing your tracking number(s). The tracking number will be active within 24 hours.
Customs, Duties, and Taxes:
Cabochons4sale is not responsible for any customs and taxes applied to your order. All fees imposed during or after shipping are the responsibility of the customer (tariffs, taxes, etc.).
International Shipping Policy:
We currently ship to most of the countries. If your country is not listed at checkout, please contact us to discuss possible shipping options
Size & Weight
- All gemstones are measured in millimeters (mm).
- Dimensions are listed as length × width × depth, except for round stones which are measured as diameter × depth.
- Always choose gemstones by size, not by weight!
- Different gem varieties have different densities, so carat weight isn’t a reliable indicator of size.
- Note: 1 ct = 0.2 g
| Treatment | Description |
|---|---|
| Natural | This gemstone has zero treatments—no heat, no irradiation, no filling, no stabilisation. It’s simply mined, cut, and polished. |
| Heated | Heating enhances or develops colour and clarity, commonly seen in Sapphire, Ruby, Tanzanite, Topaz, and Zircon. |
| Dyed | This process adds colouring agents to create a richer, more even colour. Traditionally associated with Agate and still used today for certain Onyx and Agate stones. |
| Irradiated | Radiation treatment modifies light absorption, transforming clear stones like Topaz into blue varieties. |
| Coated | A thin metallic film is added to produce the iridescent look found in Mystic or Azotic quartz. |
| Smoked | Foil-wrapping and gentle heating allow smoke to enter the opal, darkening its body colour and boosting play-of-colour. Common in some Ethiopian Black Opals. |
| Stabilised | Resin or polymer is infused into porous gems to improve hardness, density, and colour—essential for fragile stones like Turquoise. |
| Cultured | Human-assisted pearls grown in freshwater or saltwater molluscs. They grow faster and are more reliable, which keeps them affordable. |
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0% Tariff
Zero Tariffs, & Zero Surprises.
Free Drilling
Free Drilling, No Extra Cost. Click to see chart.
Stone Same As Picture
What You See Is Exactly What You Get.
True Details
Real Stones. Real Trust.
Worldwide Shipping
Fast Shipping with Tracking
Natural Black Onyx Gemstone Cabochons
About Black Onyx
Discover the timeless elegance of natural Black Onyx gemstones, admired for their rich jet-black color, smooth texture, and sophisticated appearance. Known as one of the most popular gemstones in jewelry design, Black Onyx offers a bold and luxurious look that complements both modern and classic styles.
Each Black Onyx cabochon showcases a deep, uniform black color with a beautiful polish that enhances its natural beauty. Its versatility and striking appearance make it a favorite among jewelry designers, artisans, and gemstone collectors worldwide.
Perfect for Jewelry Making
Black Onyx gemstones are ideal for creating stunning handmade jewelry pieces, including:
- Rings
- Pendants
- Earrings
- Bracelets
- Necklaces
- Wire Wrapped Jewelry
- Men's Jewelry
- Artisan Jewelry Designs
- Designer Jewelry Collections
Their classic black color pairs beautifully with silver, gold, copper, and other gemstones.
Premium Quality Gemstones
Each Black Onyx gemstone is carefully selected for its color consistency, polish, durability, shape, and overall appearance. Our cabochons feature a smooth finish and premium craftsmanship, making them ideal for professional jewelry making.
Authenticity Guaranteed
Every gemstone is tested by an authentic gemological laboratory to ensure it is natural and genuine. We are committed to providing authentic gemstones that meet professional quality standards.
Expert Gemologists & Skilled Artisans
Our team of expert gemologists and skilled artisans has over 20 years of experience in gemstone grading, selection, cutting, and finishing. Their expertise helps ensure premium quality in every gemstone.
Strict Quality Control
Each gemstone undergoes a detailed inspection process before shipping. Our quality control team carefully evaluates color, polish, finish, shape, and overall appearance to ensure only premium-grade gemstones reach our customers.
Available in Multiple Options
Choose from:
- Various Sizes
- Different Shapes
- Matching Pairs
- Single Stones
- Jewelry Making Cabochons
Every gemstone is selected to provide beauty, consistency, and quality.
Worldwide Shipping
We provide secure worldwide shipping and reliable delivery service.
✅ Flat Shipping Charge: $5 Only
✅ Add Unlimited Stones
✅ No Extra Shipping Charges
✅ Secure Packaging
✅ Smooth Worldwide Delivery
Why Choose Our Gemstones?
✔ Natural & Genuine Gemstones
✔ Lab Tested Quality
✔ Expert Gemologist Team
✔ 20+ Years of Experience
✔ Strict Quality Control
✔ Premium Polish & Finish
✔ Wide Variety of Sizes & Shapes
✔ Fast Worldwide Shipping
✔ Top Notch Customer Service
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What is Black Onyx gemstone?
Black Onyx is a striking variety of chalcedony known for its deep black appearance, smooth texture, and elegant polished finish. It is widely used in jewelry, carvings, and decorative gemstone designs. -
What makes Black Onyx popular for jewelry making?
Its dark, sophisticated color provides a strong contrast with metals and other gemstones. Black Onyx works beautifully in rings, pendants, bracelets, earrings, and statement jewelry. -
Is Black Onyx naturally black?
Black Onyx available in the gemstone market is commonly enhanced to achieve a consistent deep-black color. Natural chalcedony can occur in dark shades, but uniform black material is often treated. -
What shapes can Black Onyx gemstones be cut into?
Black Onyx can be shaped into ovals, rounds, cushions, pears, squares, rectangles, freeforms, and custom shapes. Its versatility makes it suitable for both classic and contemporary jewelry designs. -
Can Black Onyx be used as a cabochon?
Yes, Black Onyx is particularly well suited to cabochon cutting. Its smooth surface and rich color create a clean, refined appearance that works well for jewelry settings. -
How should Black Onyx gemstones be cared for?
Clean Black Onyx gently with a soft cloth and mild soapy water. Avoid harsh chemicals, ultrasonic cleaners, and sudden temperature changes to help preserve its polished surface. -
Where can I buy Black Onyx gemstones online?
You can explore Black Onyx gemstones online at Cabochons4sale, a trusted manufacturer and supplier offering gemstone options for jewelry designers, collectors, and wholesale buyers. -
How can I find quality Black Onyx for jewelry projects online?
Look for consistent color, smooth polishing, accurate measurements, and clearly presented gemstone photographs. Cabochons4sale offers Black Onyx suitable for designers looking for professionally cut gemstone pieces. -
Can Black Onyx be customized for jewelry designs?
Yes, Black Onyx can be produced in different sizes, shapes, and cutting styles to suit custom jewelry requirements. This makes it useful for both individual artisan projects and larger production orders. -
Why do jewelry designers choose Black Onyx?
Black Onyx offers a timeless appearance that pairs easily with gold, silver, platinum, and other gemstones. Its bold yet minimal look makes it suitable for men's jewelry, women's jewelry, and modern statement pieces.
Flat 5 usd shipping worldwide (add unlimited stones). We now offer DDP(Duty Paid) shipping to the USA. Ensuring zero extra tariffs. NO surprise charges on delivery.
Processing Time:
All orders are processed within 1-3 business days approx. Orders are not shipped or delivered on weekends or holidays. If we are experiencing a high volume of orders, shipments may be delayed by a few days. Please allow additional days in transit for delivery. If there will be a significant delay in the shipment of your order, we will contact you via email.
Shipping Rates & Delivery Estimates:
Shipping charges for your order will be calculated and displayed at checkout. Delivery times vary based on the shipping method chosen and the destination.
Standard Shipping: 10 to 14 business days approx (postals, xpressbees)
Express Shipping: 5 to 9 business days approx
Please note that delivery delays can occasionally occur, especially during peak seasons.
PRICE is flat 5 USD for regular shipping (add as many stones as you want in the order)
PRICE is flat 25 USD (express)
Regular Shipping ( 10 to 14 working days approx, Fully Trackable)
Tracking number provided
Express Shipping ( 5 to 9 working days approx., Fully Trackable) Tracking number provided
Shipment Confirmation & Order Tracking:
You will receive a Shipment Confirmation email once your order has shipped, containing your tracking number(s). The tracking number will be active within 24 hours.
Customs, Duties, and Taxes:
Cabochons4sale is not responsible for any customs and taxes applied to your order. All fees imposed during or after shipping are the responsibility of the customer (tariffs, taxes, etc.).
International Shipping Policy:
We currently ship to most of the countries. If your country is not listed at checkout, please contact us to discuss possible shipping options
Let customers speak for us
OVER 26 YEARS IN BUSINESS
THE EXCELLENCE IS IN OUR CUTTING
From timeless cabochons to brilliant cuts, we’ve dedicated decades to mastering the art of gemstone craftsmanship — guided by integrity, precision, and a deep love for the natural world.
