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14k yellow gold pink diamond flat back labret stud with 3-prong setting, angled studio shot
2.5mm genuine pink diamond piercing end pinched between fingers outdoors for size reference
Side profile of 14k yellow gold pink diamond flat back labret showing post length and flat disc back
Flat back labret sizing guide showing 18G and 16G gauges from 5mm to 9.5mm with ear piercing map
Round stone size comparison from 1.5mm to 4mm shown on fingertip, highlighting 3mm scale
14k yellow gold 2.5mm pink diamond flat back labret stud, angled view showing 3-prong setting detail
Pink diamond 3-prong flat back labret stud in 14k white gold, yellow gold, and rose gold side by side
2.5mm genuine pink diamond nose ring end resting on open palm outdoors to show tiny scale
14k white gold 2.5mm pink diamond flat back labret stud with 3-prong setting, angled product view
14k rose gold 2.5mm pink diamond flat back labret stud with 3-prong setting, angled product view
14k yellow gold pink diamond flat back labret stud with 3-prong setting, angled studio shot
2.5mm genuine pink diamond piercing end pinched between fingers outdoors for size reference
Side profile of 14k yellow gold pink diamond flat back labret showing post length and flat disc back
Flat back labret sizing guide showing 18G and 16G gauges from 5mm to 9.5mm with ear piercing map
Round stone size comparison from 1.5mm to 4mm shown on fingertip, highlighting 3mm scale
14k yellow gold 2.5mm pink diamond flat back labret stud, angled view showing 3-prong setting detail
Pink diamond 3-prong flat back labret stud in 14k white gold, yellow gold, and rose gold side by side
2.5mm genuine pink diamond nose ring end resting on open palm outdoors to show tiny scale
14k white gold 2.5mm pink diamond flat back labret stud with 3-prong setting, angled product view
14k rose gold 2.5mm pink diamond flat back labret stud with 3-prong setting, angled product view
Home 2.5mm Pink Diamond Lumina 3-Prong Flat Back Stud

2.5mm Pink Diamond Lumina 3-Prong Flat Back Stud

$620 $1,118 Est. Retail Value
14k yellow gold pink diamond flat back labret stud with 3-prong setting, angled studio shot
2.5mm genuine pink diamond piercing end pinched between fingers outdoors for size reference
Side profile of 14k yellow gold pink diamond flat back labret showing post length and flat disc back
Flat back labret sizing guide showing 18G and 16G gauges from 5mm to 9.5mm with ear piercing map
Round stone size comparison from 1.5mm to 4mm shown on fingertip, highlighting 3mm scale
14k yellow gold 2.5mm pink diamond flat back labret stud, angled view showing 3-prong setting detail
Pink diamond 3-prong flat back labret stud in 14k white gold, yellow gold, and rose gold side by side
2.5mm genuine pink diamond nose ring end resting on open palm outdoors to show tiny scale
14k white gold 2.5mm pink diamond flat back labret stud with 3-prong setting, angled product view
14k rose gold 2.5mm pink diamond flat back labret stud with 3-prong setting, angled product view
14k yellow gold pink diamond flat back labret stud with 3-prong setting, angled studio shot
2.5mm genuine pink diamond piercing end pinched between fingers outdoors for size reference
Side profile of 14k yellow gold pink diamond flat back labret showing post length and flat disc back
Flat back labret sizing guide showing 18G and 16G gauges from 5mm to 9.5mm with ear piercing map
Round stone size comparison from 1.5mm to 4mm shown on fingertip, highlighting 3mm scale
14k yellow gold 2.5mm pink diamond flat back labret stud, angled view showing 3-prong setting detail
Pink diamond 3-prong flat back labret stud in 14k white gold, yellow gold, and rose gold side by side
2.5mm genuine pink diamond nose ring end resting on open palm outdoors to show tiny scale
14k white gold 2.5mm pink diamond flat back labret stud with 3-prong setting, angled product view
14k rose gold 2.5mm pink diamond flat back labret stud with 3-prong setting, angled product view

Diamond Size

2.5mm
2.0mm 2.5mm 3.0mm
Size Chart

Sizing Piercing Jewelry

Choosing the right size ensures comfort, healthy healing, and a flawless look. Use this guide to understand gauge, length, and diameter, then confirm your fit with the conversion charts below.

What Is “Gauge”?

The gauge of your piercing is the thickness of the bar that passes through your piercing—i.e., the barbell’s thickness. Note the system is inverse: a lower number = thicker bar. For example, a 12G barbell is thicker than a 20G barbell.

Piercing Jewelry “Length”

The length of your piercing jewelry refers to the wearable span of a straight or curved barbell—the section that sits inside the piercing. It’s measured end-to-end on the bar and excludes any ends, balls, or charms.

measuring length of a flat back earring measuring length of a nose ring



measuring length of a straight barbell measuring length of curved barbell


Piercing Jewelry “Diameter”

The diameter is used for circular styles—hoops, captives, clickers, seam rings, and circular barbells. Measure from the innermost, widest point across the inside of the hoop.

measuring diameter of captive bead ring measuring diameter of circular barbell

Standard Piercing Sizes

Check the chart below for typical starting sizes. Like clothing, anatomy varies—your ideal size may differ.

💡 Tip: Measure a comfortable piece you already wear to confirm your fit.


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Made to order: Ready in 1–2 weeks

Solid 14k Gold

Jeweler Direct

Handmade

Piercing Advisor

Ethical Luxury

Lifetime Warranty

Looking for something different? Request a custom design →

Product Description

Description

The 2.5mm Pink Diamond Lumina Flat Back Earring strikes the perfect balance of subtle elegance and striking color. Featuring a vibrant pink diamond, this stud is set in a three-prong design that enhances the diamond's natural brilliance. The 2.5mm size is ideal for those seeking the most popular and versatile option, offering just the right amount of sparkle without being overwhelming. Its flat-back design provides a comfortable fit for lobe, lip or cartilage piercings like the tragus and helix. Whether paired with other pink piercing jewelry or worn on its own, this stud adds a touch of feminine charm and sophistication to your look, making it a must-have for any piercing lover.

  • 2.5mm (.06ct.) conflict-free enhanced natural diamond
  • Diamond Clarity: SI; Color: Pink
  • 3-Prongs minimizes visible metal
  • Solid 14k gold | Nickel-free | Hypoallergenic
  • Comfortable 3mm disc backing
  • Choose Threaded or Threadless Push-pin for 16G
  • End Only option does not include a gold backing. Backing sold separately here. All other options include backings.
  • Commonly worn as a cartilage earring: helix, conch, tragus, earlobes; lip ring: labret, Monroe, medusa, snake bites; as well as a nose ring.
  • Ethically handmade in the USA

    Useful Tips: 
  • Choosing The Perfect Diamond Flat Back
  • How Threadless Push Pin Piercing Jewelry Works 
  • Body Piercing Jewelry Size Guide
Product Details
Materials
Shipping

Pairs Well With

FreshTrends mint green travel jewelry box, closed front view with gold FT Est. 2003 logo Close-up of travel jewelry box interior holding gold piercing studs, earrings, and CZ body jewelry
Travel Jewelry Box $17
14k yellow gold dual diamond dangle flat back labret resting on glass, showing post and flat back Close-up of 14k white gold pushpin diamond dangle end showing prong detail and angled titanium pin
Prong Diamond Dangle Cartilage Flat Back Earring $371
18K yellow gold plain clicker ring hoop, front view showing high-polish finish and closed clasp 18K yellow gold plain clicker ring hoop shown open at angle, close view of clicker pin and hinge
18k Gold Plain Clicker Ring Hoop $399
Flat back earring insertion tool beside a gold CZ flat back stud, showing tool and jewelry separately Insertion tool being used in a helix piercing on a model, with gold CZ chain connector studs in lobe
Flat Back Earring Easy Insertion Tool $14
14k yellow gold 3mm VS1 diamond flat back labret stud with 3-prong Lumina setting, angled view Close-up top-down view of 3mm VS1 diamond in 14k rose gold 3-prong push-pin end, showcasing facets
3mm Lumina 3-Prong VS1 Diamond Flat Back Stud $411
14K yellow gold diamond climber flat back labret on reflective surface, angled view showing 5-stone arc Step-by-step guide showing how to insert and secure an 18G threadless push pin flat back earring
Mini Climber Diamond 14K Gold Flat Back Earring $306
14k yellow gold triple flower flat back labret with round-cut stones on marble surface, angled view Triple flower flat back stud in yellow gold, rose gold, and white gold shown front-facing for color comparison
Triple Flower Flat Back Stud $486

Jeweler-Direct Pricing

Jeweler-Direct means crafted, just for you. By skipping the middleman, we eliminate traditional retail markups — so you can enjoy luxury piercing jewelry without the inflated price.

Fresh Trends Price — $559

Est. Retail Value — $1,118

Fresh Trends Piercing Advisor™

Our complimentary Piercing Advisor™ service ensures your jewelry fits perfectly. After your order, a specialist reviews your selection, verifies your size, and guides you through any adjustments. For jewelry to be eligible for an adjustment, FreshTrends Piercing Advisor™ must be added to your cart at the time of original purchase.

Why It Matters:

• Anatomy varies, and size is crucial

• A specialist confirms your fit before we craft your piece

• You get a flawless, comfortable result—every time

Piercing Advisor Service

Handcrafted Just For You!

Our in-house jewelry designer and artisans create one-of-a-kind piercing jewelry from solid 14k gold and 950 platinum, always 100% nickel-free.

Each piece is made-to-order and never mass-produced, allowing for many gemstone and size options for the perfect fit. We take pride in hand-crafting fine body jewelry in the USA.

Fresh Trends Fine Jewelry

Because every piercing deserves its masterpiece.

Ready to Gift

Your jewelry arrives in our signature packaging—a keepsake box with a soft green pouch and a Wear & Care Guide. Premium pieces are showcased in an LED presentation box that elevates every gifting moment.

Fresh Trends Packaging

Fresh Trends® Lifetime Warranty

Every piece we craft is designed for lifelong wear. If your jewelry ever shows a manufacturing defect, we’ll repair or replace it—complimentary, for life.

Lifetime Confidence. Handmade Quality.

Gold earring with clear gemstones on a soft pink fabric background

Sustainable Jewelry

We use recycled metals to help reduce the carbon footprint of manufacturing and the negative impact of metal mining.

We plant one new tree per order in partnership with Ecologi to help restore nature and reduce the carbon footprint of our operations.

ecology

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