Click to Shop Diamond Fine Jewelry

D: 0.21 ct tw

$700

D: 0.07 ct tw

$500

D: 0.18 ct tw

$850

Large Bolo Braceletes

D: 0.75 ct tw

$2,535

Diamond Huggies

D: 1.00 ct tw

$2,410

Tension Set Diamond Stud Earrings

D: 0.15 ct tw

$575

Diamonds On The Key offers Birthstone Fancy Colored Diamonds in a variety of colors, such as Yellow (most popular fancy color!) Pink, Blue, Green and Black to fit a variety of budgets! 

Natural Pink Diamonds are among the most valuable and rare of Earth’s treasures.

Top, vivid-colored stones can bring more than $2 million per carat at major auctions.

Such prices come from their rarity as much as their beauty – only a tiny percentage of diamonds have pink color, and only a tiny percentage of these have a rich, vivid color.

Natural-color Green Diamonds are extremely rare and can be classified as faint, light, intense, vivid or deep. 

A green diamond is said to be the second rarest natural color of a diamond with fancy red being the rarest. 

Jennifer Lopez was famously given an 8.5 carat cushion cut green diamond, by Ben Affleck, in 2022, and has an estimated value to be at least $8 million!

Diamonds On The Key has had the privilege of custom making two tiaras in it's 15 year history, and who doesn't love a Tiara! Tiaras are less formal then traditional crowns. They were developed from ancient Greek diadems, ornamental headbands, often of gold, worn by kings and queens as symbols of power and authority. 

Pictured below is the "Cambridge Lover´s Knot" tiara, worn by Princess Diana & Catherine, Princess of Wales.

Also pictured are two tiaras, custom made by Diamonds On The Key, for two very lucky ladies!

Interested in creating a tiara or diamond head band of your own? We can even use your diamonds! Contact us today! 

This Summer Diamonds On The Key, not only celebrates its 15^th Anniversary in Key Biscayne but owner, Christina Termine, additionally commemorates her impressive 40^th year in the fine jewelry industry. 



Join us in Congratulating Christina on her decades of achievements!

"Forming a reliable and trusting bond with your jeweler is just as significant as the trust and service provided by your doctor, real estate agent, lawyer or financial advisor and that bond is what I aim to build with each customer for a lifetime."

Christina Termine

Mother’s Day and Graduations are fast approaching!

Diamonds On The Key has curated a wide selection of gifts, readily available on the website, or schedule a personal appointment, to view an array of sparkling options, starting from $375. 

3 Pearl Pendant Necklace

14k Yellow Gold

$375

Mother of Pearl & Diamond Earrings

14K Yellow Gold

D: 0.10 ct tw

$2,050

Oval Gold & Pearl Hoops

14 Yellow Gold



$1,065

Tension Set Diamond Pendant

18K White Gold



$1,750

Yellow Gold & Diamond Bangle Bracelet

14K Yellow Gold

D: 0.39 ct tw

$4,975

Chain Link Ring

14K Yellow gold

D: 0.70 ct tw

$2,785

Diamond Bracelet

D: 0.07 ct tw



$395

Paperclip Bracelet Medium

14K Yellow Gold

$970

Chicklet Drop Earrings

14K Yellow gold

D: 0.08 ct tw

$1,070

Look for our new dedicated email "MID-MONTH MAKEOVERS" beginning

March 13th along with our "MONDAY MAKEOVER" dedicated social media posts! Each will highlight great transformations of our client's jewelry and one-of-kind custom designs!