SIGMA | Black Tungsten Ring and White Interior
SIGMA Tungsten Carbide Men's Ring
The SIGMA is a tungsten carbide men's wedding ring in 8mm width. Custom engraved and shipped from our Irving, Texas shop. Free US shipping, free inside engraving, lifetime warranty, and lifetime sizing. Every SIGMA ships ready to wear.
Color: Black & White
Available Sizes: 5 – 14, including half sizes
Width: 8mm
This immaculate flat profile wedding band is molded in Black Tungsten Carbide and features a brushed finish center with polished bevel edges and a white domed interior.
- Free inside laser engraving available, does not delay your order.
- Backed by our lifetime warranty against manufacturing defects and lifetime sizing exchange.
- Built in a confident 8mm width.
- Please note, Black Tungsten Carbide rings are scratch-resistant and very durable but can be scratched.
- Comfort fit. Rounded interior glides over the knuckle for all-day comfort.
Key Features
- Material: Tungsten Carbide
- Fit: Comfort Fit with rounded interior
- Width: 8mm
- Color: Black & White
- Engraving: Free inside laser engraving available
- Hypoallergenic: Nickel-free
- Warranty: Lifetime warranty against manufacturing defects
- Sizing: Lifetime sizing, swap the size any time
- Shipping: Free US shipping, ships in 1-2 business days
- Returns: 30 days from receipt on unworn rings
About Tungsten Carbide
Tungsten carbide is one of the hardest metals used in jewelry. It's much harder than titanium, gold, or platinum, holds a mirror polish that doesn't dull from daily wear, doesn't bend out of round, and resists scratching from almost anything you'll encounter day-to-day.
The trade-off is that tungsten is harder than it is tough. A direct hammer-strike or a fall onto concrete from height can chip it. In an emergency it can be cracked off the finger with standard ER tools, which is actually a safety advantage compared to gold or platinum.
Tungsten rings don't trigger nickel allergies, don't tarnish, and don't oxidize. The SIGMA holds the same finish years into wear as it has on day one.
What makes our SIGMA different
Custom engraved in our Irving, Texas shop. Aydins Jewelry has been selling rings since 2011, with over 10,000 orders shipped.
- Free US shipping on every SIGMA order
- Free inside laser engraving (date, initials, coordinates, phrase, whatever you want)
- Lifetime warranty against manufacturing defects
- Lifetime sizing: if it doesn't fit, send it back any time and we'll swap the size
- 30-day returns from receipt on unworn rings
Sizing & Fit
The SIGMA is comfort fit, meaning the inside of the band is rounded rather than flat, which makes it easier to slide over the knuckle and more comfortable for all-day wear. Comfort-fit rings typically size a half-size smaller than standard-fit rings, so if you normally wear a size 10 standard-fit, you'll likely wear a 9.5 in the SIGMA.
Available sizes: 5 – 14, including half sizes.
Not sure what size you wear? Use our free ring sizing guide, or order any size and use our lifetime sizing to swap if it doesn't fit perfectly the first time.
Care Instructions
Wipe the SIGMA with a soft cloth. That's the core care routine. Tungsten doesn't tarnish, doesn't oxidize, and doesn't lose its polish from daily wear. For a deeper clean, warm water and mild dish soap; rinse, dry, done. Avoid dropping on tile or concrete (tungsten is hard but brittle), and remove for heavy hammer/chisel work.
Engraving
Every SIGMA includes free inside laser engraving. Add a wedding date, initials, coordinates, or any phrase up to 30 characters. Engraving is permanent, professionally applied, and does not delay shipping.
Frequently Asked Questions
What color is the SIGMA?
The SIGMA features black & white.
What sizes does the SIGMA come in?
The SIGMA is available in sizes 5 – 14, including half sizes. If you're between sizes, lifetime sizing is included, so you can order, try it, and swap if needed.
Is the SIGMA comfort fit?
Yes. The SIGMA is comfort fit, meaning the inside of the band is gently rounded so it slides over the knuckle easily and sits flat against the finger. Most wearers find it comfortable enough to forget they're wearing it.
Is the SIGMA durable for daily wear?
Tungsten carbide is one of the most scratch-resistant materials used in jewelry, and much harder than gold, titanium, or platinum. The SIGMA is highly resistant to scratches from daily wear. It is brittle under sharp impact, so avoid hammer-strikes or drops onto concrete.
Is the SIGMA hypoallergenic?
Yes. The SIGMA is nickel-free and hypoallergenic, safe for sensitive skin and people with metal allergies.
Can the SIGMA be engraved?
Yes. Free inside laser engraving is included with every SIGMA. You can add a date, initials, a phrase, or coordinates. Engraving doesn't delay shipping.
What if the ring doesn't fit?
Lifetime sizing is included with every SIGMA. If it doesn't fit, ship it back and we'll send a different size, even years after the original purchase.
How long does shipping take?
Free standard shipping ships within 1-2 business days from our Irving, Texas shop and arrives in 3-5 business days within the US. Most SIGMA orders arrive within a week of ordering.
What is Aydins' return policy?
See our returns and exchanges page for full details.
Can the SIGMA be cut off in an emergency?
Yes. Both tungsten and ceramic rings can be safely removed in an emergency. Hospitals use a tool that cracks the band cleanly off the finger without needing to cut through it. This is actually a safety advantage over gold or platinum, which require more time-consuming cutting.
Original: $249.00
-65%$249.00
$87.15Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
SIGMA Tungsten Carbide Men's Ring
The SIGMA is a tungsten carbide men's wedding ring in 8mm width. Custom engraved and shipped from our Irving, Texas shop. Free US shipping, free inside engraving, lifetime warranty, and lifetime sizing. Every SIGMA ships ready to wear.
Color: Black & White
Available Sizes: 5 – 14, including half sizes
Width: 8mm
This immaculate flat profile wedding band is molded in Black Tungsten Carbide and features a brushed finish center with polished bevel edges and a white domed interior.
- Free inside laser engraving available, does not delay your order.
- Backed by our lifetime warranty against manufacturing defects and lifetime sizing exchange.
- Built in a confident 8mm width.
- Please note, Black Tungsten Carbide rings are scratch-resistant and very durable but can be scratched.
- Comfort fit. Rounded interior glides over the knuckle for all-day comfort.
Key Features
- Material: Tungsten Carbide
- Fit: Comfort Fit with rounded interior
- Width: 8mm
- Color: Black & White
- Engraving: Free inside laser engraving available
- Hypoallergenic: Nickel-free
- Warranty: Lifetime warranty against manufacturing defects
- Sizing: Lifetime sizing, swap the size any time
- Shipping: Free US shipping, ships in 1-2 business days
- Returns: 30 days from receipt on unworn rings
About Tungsten Carbide
Tungsten carbide is one of the hardest metals used in jewelry. It's much harder than titanium, gold, or platinum, holds a mirror polish that doesn't dull from daily wear, doesn't bend out of round, and resists scratching from almost anything you'll encounter day-to-day.
The trade-off is that tungsten is harder than it is tough. A direct hammer-strike or a fall onto concrete from height can chip it. In an emergency it can be cracked off the finger with standard ER tools, which is actually a safety advantage compared to gold or platinum.
Tungsten rings don't trigger nickel allergies, don't tarnish, and don't oxidize. The SIGMA holds the same finish years into wear as it has on day one.
What makes our SIGMA different
Custom engraved in our Irving, Texas shop. Aydins Jewelry has been selling rings since 2011, with over 10,000 orders shipped.
- Free US shipping on every SIGMA order
- Free inside laser engraving (date, initials, coordinates, phrase, whatever you want)
- Lifetime warranty against manufacturing defects
- Lifetime sizing: if it doesn't fit, send it back any time and we'll swap the size
- 30-day returns from receipt on unworn rings
Sizing & Fit
The SIGMA is comfort fit, meaning the inside of the band is rounded rather than flat, which makes it easier to slide over the knuckle and more comfortable for all-day wear. Comfort-fit rings typically size a half-size smaller than standard-fit rings, so if you normally wear a size 10 standard-fit, you'll likely wear a 9.5 in the SIGMA.
Available sizes: 5 – 14, including half sizes.
Not sure what size you wear? Use our free ring sizing guide, or order any size and use our lifetime sizing to swap if it doesn't fit perfectly the first time.
Care Instructions
Wipe the SIGMA with a soft cloth. That's the core care routine. Tungsten doesn't tarnish, doesn't oxidize, and doesn't lose its polish from daily wear. For a deeper clean, warm water and mild dish soap; rinse, dry, done. Avoid dropping on tile or concrete (tungsten is hard but brittle), and remove for heavy hammer/chisel work.
Engraving
Every SIGMA includes free inside laser engraving. Add a wedding date, initials, coordinates, or any phrase up to 30 characters. Engraving is permanent, professionally applied, and does not delay shipping.
Frequently Asked Questions
What color is the SIGMA?
The SIGMA features black & white.
What sizes does the SIGMA come in?
The SIGMA is available in sizes 5 – 14, including half sizes. If you're between sizes, lifetime sizing is included, so you can order, try it, and swap if needed.
Is the SIGMA comfort fit?
Yes. The SIGMA is comfort fit, meaning the inside of the band is gently rounded so it slides over the knuckle easily and sits flat against the finger. Most wearers find it comfortable enough to forget they're wearing it.
Is the SIGMA durable for daily wear?
Tungsten carbide is one of the most scratch-resistant materials used in jewelry, and much harder than gold, titanium, or platinum. The SIGMA is highly resistant to scratches from daily wear. It is brittle under sharp impact, so avoid hammer-strikes or drops onto concrete.
Is the SIGMA hypoallergenic?
Yes. The SIGMA is nickel-free and hypoallergenic, safe for sensitive skin and people with metal allergies.
Can the SIGMA be engraved?
Yes. Free inside laser engraving is included with every SIGMA. You can add a date, initials, a phrase, or coordinates. Engraving doesn't delay shipping.
What if the ring doesn't fit?
Lifetime sizing is included with every SIGMA. If it doesn't fit, ship it back and we'll send a different size, even years after the original purchase.
How long does shipping take?
Free standard shipping ships within 1-2 business days from our Irving, Texas shop and arrives in 3-5 business days within the US. Most SIGMA orders arrive within a week of ordering.
What is Aydins' return policy?
See our returns and exchanges page for full details.
Can the SIGMA be cut off in an emergency?
Yes. Both tungsten and ceramic rings can be safely removed in an emergency. Hospitals use a tool that cracks the band cleanly off the finger without needing to cut through it. This is actually a safety advantage over gold or platinum, which require more time-consuming cutting.
