Guinevere gemstone size

Relative Guinevere Diamond

& Gemstone Sizes

You can read why we recommend different sizes of diamonds, depending upon what you are looking for. 

Colored Gemstone Measurements
Colored gemstones are measured in millimeter sizes, and the carat weight is incidental. Two 4mm stones can have different carat weights, depending on the depth of the stone. These two stones will look visually the same, though, because the eye only sees the length and the width..

So when you order a colored gemstone, we

usually will give you the millimeter dimensions, but the stone may be 0.42CT or it could be 0.58CT. The weight will depend on how deep the stone is. If you really want a certain carat weight, let Mandira know, and she will find you the stone closest to that weight.

Diamond Measurements
Diamonds are always measured in carat weight, and the millimeter size is incidental. Two diamonds of the same carat weight can look visually different, because they have different millimeter sizes. When you order a diamond, you specify the carat range that you want, and we will get you a diamond in this range.

This Guinevere puzzle ring is shown with a 3mm colored gemstone, which is about 1/5CT or 0.20CT.

We do not make the Guinevere
with a diamond of this millimeter
size, as it would be only 0.10CT.

This is a medium weight puzzle ring with an open weave.

Guinevere puzzle ring with 0.25CT round diamond. This is the smallest size round diamond we will place in this ring.

It is 3.81 – 4.10 mm in diameter. See next row left image for colored gemstone in this size.

Medium weight puzzle ring with open weave.

Guinevere puzzle ring with a
4mm round gemstone (rhodolite garnet), which is approximately 1/3 CT to 0.40CT.

This size is approx. 0.25CT in a diamond
(See diamond image above right).

Medium weight puzzle ring with open weave.

Guinevere puzzle ring with
3.75mm princess-cut sapphire, which is
0.37CT.
This is the smallest square stone we will place in this ring. The princess-cut stone tends to look smaller for it’s carat weight than other sizes of diamonds or gemstones.

Medium weight puzzle ring with open weave.

Guinevere puzzle ring with a 1/3CT diamond, which is approximately 4.3mm in diameter.

Note this set is made with an open weave, something we rarely make with an eternity band. Usually we’ll do a tight or standard weave for this style of wedding ring.

This is a medium weight puzzle ring.

Trivia: Anniversary rings with diamonds all around are frequently referred to as “eternity” bands, but in fact, an eternity band is any ring that has a uniform width all the way around: in other words, what we think of as a traditional wedding ring.

Guinevere puzzle ring with a 4mm princess-cut gemstone (London blue topaz).

This size stone is usually between 0.40CT and 0.50CT in a colored gemstone.

A diamond in this size will be approximately 0.375CT to 0.42CT.

Regardless of the carat weight, the visual look will be the same. Variations in carat weight are caused by varying stone depths.

Medium weight puzzle ring with tight weave

The 4.5mm pink sapphire is flanked by two five-point acccent diamonds.

This stone is 0.50CT.

Medium weight puzzle ring with an open weave.

Carat weights of a specific colored gemstone of a given millimeter size can vary over time. By that we mean that this 4.5mm pink sapphire was cut to 0.50CT weight, but another time, we may find that a 4.5mm sapphire will be 0.45CT or 0.48CT. In any case, the visual look will be identical since the millimeter size is the same.

Above is a Guinevere Puzzle Ring with a 0.48CT diamond.

The size range for a “half-carat” diamond is approximately .47CT to .53CT, and these diamonds are, on average, about 4.2 to 4.3mm mm square, with considerable variation possible.

Medium weight puzzle ring with an open weave.

This Guinevere puzzle ring is shown with a 0.50CT diamond. Note the kite orientation of the setting.

See notes to left on this size diamond.

Medium weight puzzle ring with a standard weave.

The Guinevere Royale puzzle ring above is created with a 0.50CT center princess-cut diamond and two accent 5-point rubies.

The size range for a “half-carat” diamond is approximately .47CT to .53CT, and these diamonds are, on average, about 4.2 to 4.3mm mm square, with considerable variation possible.

Medium weight puzzle ring with a standard weave.

A princess-cut Guinevere Royale puzzle ring in 14K yellow gold with 14K white gold settings. A 0.50CT diamond is accented with two five-point emeralds. 

The size range for a “half-carat” diamond is approximately .47CT to .53CT, and these diamonds are, on average, about 4.2 to 4.3mm mm square, with considerable variation possible.  

Medium weight puzzle ring with a standard weave.

The “Royale” designation means a ring has two side stones. It is pronounced Roy-Al (The two men’s names).

A Guinevere Royale Claddagh Band Celtic puzzle bridal set with 0.50CT center and two five-point accent sapphires.

The size range for a “half-carat” diamond is approximately .47CT to .53CT, and these diamonds are, on average, about 4.2 to 4.3mm mm square, with considerable variation possible.

Medium weight puzzle ring with a standard weave.

An all-diamond Guinevere Royale/ yovrs onli puzzle/poesy bridal set with 0.50CT center and two five-point accent diamonds.

Medium weight puzzle ring with a standard weave.

A 0.60CT princess-cut diamond graces this Guinevere puzzle ring.

A diamond of this weight will average approximately 4.25 to 4.35mm square.

Medium weight puzzle ring with a standard weave.

A 0.63CT sapphire on a Guinevere puzzle ring.

This stone is 4.5mm square, and some stones of this millimeter size are heavier, at 3/4CT, so require a slightly heavier puzzle ring.

Medium weight puzzle ring with tight weave.

A Guinevere Royale with a 0.70CT princess cut diamond and two ten-point accent emeralds.

A 7/10 CT diamond will be approximately 4.5mm to 4.7mm square.

Medium weight puzzle ring with an open weave.

(Notice this ring has a completely different look to it with the larger accent stones.)

This Guinevere puzzle ring shows a 0.78CT diamond.

A diamond of this size will be approximately 4.6mm to 4.8mm square.

Just-over-medium-weight puzzle ring. For gemstones of 3/4CT to 1CT, this is the lightest weight of puzzle ring we use, so the ring will be sturdy enough to support a stone of this size.

This Guinevere Royale puzzle ring shows a 0.85CT amethyst flanked by accent 5-point Mexican fire opals.

The center stone is 5.5mm square.

Just-over-medium-weight with open weave.t a stone of this size.

A six-band Guinevere puzzle ring with a 1CT rhodolite garnet is paired with a platinum Latin “I am my Beloved’s and my Beloved is mine” poesy ring. This stone is 6mm square and can be placed on a four-band puzzle ring of the same weight.

Just-over-medium-weight puzzle ring with standard weave.