Cart (0)
1 Choose your diamond
1. Diamond
Design Diamond Icon
2 Choose your Setting
2. Setting
Design Ring Setting Icon
3 View Completed
3. Preview
Design Ring Setting Icon
Edit Columns

Platinum Round Cut Three Stone Engagement Rings

Shop our beautiful collection of Platinum Round Cut Three Stone Engagement Rings. Choose from our large selection of natural and lab grown diamonds to complete your engagement ring.

Filters:
Style
Shape
Metal
Price
Band Width
The Ellie Three-Stone
Video play badge
Add To List
Save for later
14kt White Gold
14kt White Gold
18kt White Gold
18kt White Gold
18kt Yellow Gold
18kt Yellow Gold
18kt Rose Gold
18kt Rose Gold
Platinum
Platinum

$4,322.00
Three-Stone Solitaire Engagement Ring

The Lina Halo
Video play badge
Add To List
Save for later
14kt White Gold
14kt White Gold
18kt Yellow Gold
18kt Yellow Gold
18kt White Gold
18kt White Gold
18kt Rose Gold
18kt Rose Gold
Platinum
Platinum

$4,662.00
Tapered Channel-Set Diamond Band Engagement Ring

The Bea Three-Stone
Video play badge
Add To List
Save for later
14kt White Gold
14kt White Gold
18kt White Gold
18kt White Gold
18kt Yellow Gold
18kt Yellow Gold
18kt Rose Gold
18kt Rose Gold
Platinum
Platinum

$5,103.00
Tapered Baguette Diamond Band Engagement Ring

The Olivia Three-Stone
Video play badge
Add To List
Save for later
14kt White Gold
14kt White Gold
18kt White Gold
18kt White Gold
18kt Yellow Gold
18kt Yellow Gold
18kt Rose Gold
18kt Rose Gold
Platinum
Platinum

$5,153.00
Three-Stone Solitaire Engagement Ring

The Ava Three-Stone
Video play badge
Add To List
Save for later
14kt White Gold
14kt White Gold
18kt White Gold
18kt White Gold
18kt Yellow Gold
18kt Yellow Gold
18kt Rose Gold
18kt Rose Gold
Platinum
Platinum

$5,368.00
Three-Stone Diamond Engagement Ring

The Emma Three-Stone
Video play badge
Add To List
Save for later
14kt White Gold
14kt White Gold
18kt White Gold
18kt White Gold
18kt Yellow Gold
18kt Yellow Gold
18kt Rose Gold
18kt Rose Gold
Platinum
Platinum

$5,368.00
Tapered Baguette Diamond Engagement Ring

You’ve viewed 6 of 6 products

Shop our beautiful collection of Platinum Round Cut Three Stone Engagement Rings. Choose from our large selection of natural and lab grown diamonds to complete your engagement ring.

Platinum Round Cut Three Stone Engagement Rings

Shape

Round cut diamonds (also called brilliant-cut diamonds) are revered for their classic shape and incredible sparkle. Cut with 58 facets — or 57, if there is no culet — the round shape was designed to produce as much sparkle as possible. As sparkle is what many people are looking for when they buy a diamond, round cuts are immensely popular.

60% of the diamonds in our inventory are round-shaped, making it easy for you to find the right one for your needs. Not only are round cut diamonds the most sparkly, but they are also the most popular diamond shape. However, because they are the most sparkly and the most popular, this makes them the most expensive diamond shape.

Round cut diamonds are perfect for custom jewelry, such as earrings and pendants. To make your round cut diamond appear even larger, choose a halo setting. Or let your round cut diamond stand out on its own in a solitaire setting.

Ring Style

Why have one diamond when you can have three? In a three-stone engagement ring, the stones represent your past, present, and future together as a couple. This style is also sometimes referred to as a trilogy engagement ring. The most popular three-stone engagement ring styles are rings with baguette side stones flanking the center diamond or round diamond side stones. Some famous three-stone engagement rings include Meghan Markle's engagement ring, a cushion-cut diamond ring with two round-cut diamonds, and Amal Clooney's engagement ring, an emerald-cut diamond ring with two baguette-cut diamonds.

Metal

Platinum is a very popular choice for engagement rings. Platinum is a white metal that is also extremely durable. Because platinum is too soft in it's pure form to be used for jewelry, it is usually combined with a small percentage of other metal alloys such as cobalt, iridium, ruthenium, or palladium.

Lab Grown and Natural Diamonds

To complete your engagement ring, choose from our large selection of certified natural and lab grown diamonds. Whether you are looking for a 1 carat diamond or a 5 carat diamond, you are sure to find something that matches your expectations. Save 40% or more by choosing from our lab grown diamond collections.

All Ritani diamonds are certified by independent diamond grading laboratories. Our earth grown diamonds are certified by either the AGS or GIA – the two most respected independent grading labs in the world, while most of our lab grown diamonds are certified by IGI, the most respected independent lab diamond grading labaratory.

If you need help selecting your Platinum Round Cut Three Stone Engagement Rings, reach out to us at 1-888-9RITANI or chat now.

Frequently Asked Questions

  • How much should I spend for an engagement ring?
    arrow

    You may have heard the rule that you should spend 2 or 3 months of your income on your engagement ring, but this rule was just a marketing ploy created by De Beers. Your spend should be based on your budget and the type of engagement ring you are looking to buy.

  • What should I know before buying an engagement ring?
    arrow

    1. Budget - how much you are willing to spend on a ring
    2. Ring Style - are you looking for a classic ring or maybe a vintage ring?
    3. Metal - rings can be made of platinum or different types of gold
    4. Shape - the shape of the center diamond in your engagement ring
    5. 4 Cs - the color, clarity, cut and size of your diamond are important criteria in choosing your diamond

  • What is the average cost of an engagement ring?
    arrow

    For natural diamonds, the average cost is around $6,000 and the average carat weight is 1.25 carats. For lab grown diamonds, the average cost is $4,000 and the average carat weight is 2.5 carats.

  • What is a karat?
    arrow

    Since gold is too soft to be used in a ring, it is often mixed with other metals. The purity of gold is measured in karats. One karat is one part out of 24. Therefore, 24 karat gold is 100% gold (24/24), 18 karat is 75% gold (18/24), while 14 karat is about 58% gold (14/24).

  • Is platinum a good choice for an engagement ring?
    arrow

    Platinum is a very popular choice for engagement rings. It is the most durable out of the engagement ring metals and is naturally white so it does not require rhodium plating.

  • Is platinum more expensive than gold?
    arrow

    The price of precious metals are constantly fluctuating. However, platinum rings are usually made of 90-95% platinum, while gold rings are typically made of only 75% gold (for 18 karat gold) or less. Therefore, platinum rings are typically more expensive than gold rings.