Custom Initial & Birthstone Necklace
A necklace made just for your story.
Create a piece that's uniquely yours by choosing every detail, transforming a meaningful moment, person or promise into something you can wear every day.
All stones are 7A CZ, inspired by birthstone colours.
Step 1 - Choose Your Metal
Select between 18k Gold Vermeil or Sterling Silver.
Step 2 - Choose Your Birthstone Shape
Choose the silhouette that feels most like you - Round, Marquise, Heart or Emerald Cut.
Step 3 - Choose Your Birthstone Colour
Select the birthstone colour that holds your meaning. Whether it represents your own birth month, a loved one, a child, partner, friend or a special memory, every colour tells a story.
Step 4 - Personalise With An Initial
Complete your design with an initial that matters most. Your own, someone you love, or a letter that represents a meaningful chapter of your life.
Once your selections are made, our jewellers will carefully craft your necklace to order, creating a piece that's completely personal to you.
A wearable story. A promise made personal.
Crafted for You
Every piece from The Promise Lab is individually crafted to your exact specifications. Our jewellers create each piece for you - making it as unique as the story behind it. Please allow approximately 2-3 weeks for production before dispatch
Final Sale - As each piece is made specifically for you, orders from The Promise Lab cannot be returned, exchanged, cancelled or amended once production has begun. We encourage you to carefully review all details before placing your order.
Each piece is handcrafted with hand-set components, so the finish, stone colour and exact placement may differ slightly from the images shown. These natural variations are unique to your piece.
Promise 5 Year Warranty
Your jewelry is more than an accessory - it’s a symbol of love, commitment, and life’s cherished moments. That’s why every piece comes with a 5-year warranty for complete peace of mind.
We’ll repair any manufacturing faults free of charge or replace your piece if a repair isn’t possible.
If your warranty has expired, or any accidental damage has occurred please reach out. We’ll still do our best to help with repairs or replacements at a reduced fee.
Materials
Gold Vermeil - A thick layer of real 18k or 14k gold bonded to solid sterling silver - up to 25x thicker than standard plating. Designed to last, crafted to shine, made to hold meaning.
Solid 925 sterling silver - finished with rhodium - a rare metal from the platinum family. This bright, durable layer protects against tarnish and keeps every piece shining beautifully.
Rhodium Plating applied to sterling silver. Rhodium is one of the world’s most precious metals, known for its mirror-like shine and exceptional resistance to tarnishing.
Protective anti-tarnish coating that helps preserve shine and colour over time. It adds an invisible shield against daily wear, so your jewelry stays as beautiful as the day you received it.
Conflict-free simulated diamonds, hand-set promise zirconia for a flawless finish.
Sparkle Index (Refractive Index)
Our stones: 2.18 | Natural diamonds: 2.41
Durability (MOHS Hardness)
Our stones: 8.5 | Natural diamonds: 10
Shipping
We ship directly from our UK warehouse with care and speed.
Free 24-hour delivery on all orders over £130.
Orders placed before 1pm UK time (Monday-Friday) are dispatched same day.
24 hour & 48 hour delivery (Monday-Saturday) available at checkout.
Every parcel is fully tracked and beautifully packaged - ready to gift the moment it arrives.
Please note we do not ship on weekends or bank holidays. Fulfilment
and delivery times may vary due to busy periods and or courier delays.
Choose options
what makes us different
Our pieces are symbols of love, commitment, and the moments that matter most.
That's why we obsess over every detail.
So each and every piece is made to be kept forever.
Every piece is hand-set by our master jewellers, backed by a 5-year warranty, and made to the best-in-class standards of the National Association of Jewellers.
A promise you can trust.
