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- Free Shipping Over $75
- Lifetime Warranty
- Conflict Free
- Over 250,000 Happy Customers
- Easy US-based returns
- Free Shipping Over $75
- Lifetime Warranty
- Conflict Free
- Over 250,000 Happy Customers
- Easy US-based returns
- Free Shipping Over $75
- Lifetime Warranty
- Conflict Free
- Over 250,000 Happy Customers
The Gianna

The Gianna 1CT Alexandrite Ring – Color-Changing Hexagon-Cut Beauty
If you're looking for a ring that stands out in all the right ways, The Gianna 1CT Hexagon Cut Alexandrite Ring is the one for you.
At the heart of this exquisite piece is a 1-carat hexagon-cut Alexandrite, a rare gemstone known for its stunning color-changing properties. It transforms from cool greenish-blue hues in daylight to rich purples and reds when the light softens in the evening—it's like having a gemstone that reflects your mood and surroundings.
The classic 6-prong setting beautifully emphasizes the hexagonal shape of the Alexandrite, while the sleek band is adorned with sparkling lab-grown diamonds to add extra luxury. The Gianna also features an adjustable open band that accommodates sizes 3 to 13, ensuring a perfect fit for everyone. You can choose from a variety of finishes, including Platinum Vermeil, 18K Gold Vermeil, 18K Rose Gold Vermeil, or Solid 14K Gold in yellow, rose, or white.
Why You’ll Love The Gianna:
- Unique Hexagon Design: A modern, geometric Alexandrite that sets you apart with a fresh and captivating look.
- Color-Changing Brilliance: Watch as The Gianna shifts colors throughout the day—truly magical and mesmerizing.
- Eco-Friendly Luxury: Both the Alexandrite and diamonds are lab-grown, offering a guilt-free, sustainable choice.
- Perfect Fit: The adjustable open band fits sizes 3 to 13, so there’s no need to worry about sizing.
- Customizable Style: Choose your preferred finish to make The Gianna completely your own.
Perfect For:
- Engagements with a Twist: Alexandrite offers a stunning, meaningful alternative to diamonds for those seeking something unique.
- Anniversaries or Special Moments: Celebrate milestones with a gemstone that changes with the light, just like your journey.
- Personal Indulgence: Treat yourself to a one-of-a-kind ring that’s as special as you are.
💍 Celebrate love and magic with The Gianna.
The Details:
- Gemstone: 1CT Hexagon-Cut Alexandrite (color-changing brilliance)
- Clarity: Internally Flawless (FL)
- Setting: Classic 6-prong
- Sidestones: Lab-grown diamonds for added sparkle
-
Band Options:
- Platinum Vermeil
- 18K Gold Vermeil
- 18K Rose Gold Vermeil
- Solid 14K Yellow, Rose, or White Gold
- Fit: Adjustable open band (one size fits all, US sizes 3-13)
Materials
Our lab-grown Alexandrite rings are all handmade and crafted to perfection. They are a gorgeous alternative to mined gems. You get all of the beauty without the price tag.
Our stones are cut to the highest quality standards. They are completely colorless and clear. We guarantee they will amaze you with their cut, color, clarity and brilliant sparkle.
- Stone: Ideal Cut Alexandrite
- Stone Quality: FL, IF (internally flawless - high quality).
- CT Size: The Martha Features a 0.8CT (carat) Round Cut Alexandrite. We accept custom requests if you wish for a different CT size. Check the details above for specifics on this ring.
- Band Material: Platinum Vermeil (silver color) & Solid 14K white gold.
- Fit: US Standard Fit sizes 3-13
Size and Fit
This ring has an adjustable band.
Some of our rings feature an open band which can be gently opened and tugged on to fit any finger. The rings are adjustable from size 3-13, which means you don't need to worry about sizing.
Doesn't fit? We offer super simple paid and done for you returns & exchanges in case you have issues with the fit.
Ring Size Chart
US Size | UK Size | AU Size | CA Size | Diameter (mm) | Circumference (mm) |
---|---|---|---|---|---|
3 | F | F | 3 | 14.1 | 44.2 |
3.5 | G | G | 3.5 | 14.5 | 45.5 |
4 | H | H | 4 | 14.9 | 46.8 |
4.5 | I | I | 4.5 | 15.3 | 48 |
5 | J | J | 5 | 15.7 | 49.3 |
5.5 | K | K | 5.5 | 16.1 | 50.6 |
6 | L | L | 6 | 16.5 | 51.9 |
6.5 | M | M | 6.5 | 16.9 | 53.1 |
7 | N | N | 7 | 17.3 | 54.4 |
7.5 | O | O | 7.5 | 17.7 | 55.7 |
8 | P | P | 8 | 18.1 | 57 |
8.5 | Q | Q | 8.5 | 18.5 | 58.3 |
9 | R | R | 9 | 19 | 59.5 |
9.5 | S | S | 9.5 | 19.4 | 60.8 |
10 | T | T | 10 | 19.8 | 62.1 |
10.5 | U | U | 10.5 | 20.2 | 63.4 |
11 | V | V | 11 | 20.6 | 64.6 |
11.5 | W | W | 11.5 | 21 | 65.9 |
12 | X | X | 12 | 21.4 | 67.2 |
12.5 | Y | Y | 12.5 | 21.8 | 68.4 |
13 | Z | Z | 13 | 22.2 | 69.7 |