Prong Set Round Blue Sapphire Platinum Solitaire Cathedral Engagement Ring
Prong Set Round Blue Sapphire Platinum Solitaire Cathedral Engagement Ring
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Introducing the Prong Set Round Blue Sapphire Platinum Solitaire Cathedral Engagement Ring! This unique and elegant design features a stunning natural blue sapphire, set in a modern, yet classic design. With a beautiful blue sapphire set in a floral platinum head and a narrow cathedral-style shank, this ring is sure to last a lifetime.
This stunningly gorgeous piece is just ready to hop onto the ring finger of your special someone and bring a lifetime of joy. Pop the question with this unique, captivating piece and make their heart skip a beat. This ring is ready to ship and can be sized.
♥ It can be stacked with any type of straight or curved wedding band (sold separately). Shown with a plain band and the Louise band.
♥ The well-cut sapphire has a stunning blue color. In natural light, it is mostly blue but in certain lighting conditions (LED for instance) it does show some teal colors. The sapphire is eye clean and just beautiful.
Sapphire Specifications:
- Mined Genuine Sapphire
- Weight: ~0.6ct
- Size: 5.13mm diameter 3.3mm depth
- Cut: Round Brilliant Cut
- Treatment: none
- Color: medium to dark blue, teal in some light
- Clarity: Eye Clean
- Origin: Madagascar
The Madagascar sapphire has been cut from ethically sourced rough. It is completely free from all treatments. No Heat.
Mounting Specifications:
- Low profile 4-prong setting
- recycled 950pt platinum
- polished finish
- Height above finger 5.4mm
- Ring shank about 1.5mm with a slight taper towards the bottom, 1.4mm to 1.7mm thick
-
This ring is ready to ship in US size 7 (17.3mm ID). It can be resized between sizes 4 to 9. Please note your ring size & allow extra time for sizing.
The ring can be custom-made in other metal options and with different gemstones.
Ring Size Chart
Ring Size Chart
Request a Free Ring Sizer
We are happy to send you a complimentary ring sizer so that you can easily measure your ring size at home. Ring sizers shipped to US addresses only and will arrive within 5 to 10 business days.
Ring Size Chart
All Nodeform rings are specified in standard US sizes. View the conversion chart to see how US sizes map to finger diameter, as well as how US sizes convert to Canada, Australia, UK and other countries.
View the International Ring Size Chart
Inside Diameter in mm |
US, Canada, Mexico |
UK, Australia, Ireland, New Zealand, South Africa |
France |
Germany, Russia, Ukraine, Asia |
India, China, Japan, South America, Turkey, Israel |
Italy, Spain, Netherlands, Switzerland |
|
||||||
14.07 |
3 |
F |
44 |
14 |
4 |
4 |
14.27 |
3.25 |
F 3/4 |
44.625 |
14.25 |
--- |
4.625 |
14.48 |
3.5 |
G 1/4 |
45.25 |
14.5 |
5 |
5.25 |
14.68 |
3.75 |
H |
45.875 |
14.75 |
6 |
5.875 |
14.88 |
4 |
H 1/2 |
46.5 |
15 |
7 |
6.5 |
15.09 |
4.25 |
I |
47.125 |
15.25 |
--- |
7.125 |
15.29 |
4.5 |
I 1/2 |
47.75 |
15.5 |
8 |
7.75 |
15.49 |
4.75 |
J 1/4 |
48.375 |
--- |
--- |
8.375 |
15.70 |
5 |
J 1/2 |
49 |
15.75 |
9 |
9 |
15.90 |
5.25 |
K 1/4 |
49.625 |
16 |
--- |
9.625 |
16.10 |
5.5 |
L |
50.25 |
16.25 |
10 |
10.25 |
16.31 |
5.75 |
L 1/4 |
50.875 |
--- |
11 |
10.875 |
16.51 |
6 |
M |
51.5 |
16.5 |
12 |
11.5 |
16.71 |
6.25 |
M 1/2 |
52.125 |
16.75 |
--- |
12.125 |
16.92 |
6.5 |
N |
52.75 |
17 |
13 |
12.75 |
17.12 |
6.75 |
N 1/2 |
53.375 |
--- |
--- |
13.375 |
17.32 |
7 |
O |
54 |
17.25 |
14 |
14 |
17.53 |
7.25 |
O 1/2 |
54.625 |
17.5 |
--- |
14.625 |
17.75 |
7.5 |
P |
55.25 |
17.75 |
15 |
15.25 |
17.93 |
7.75 |
P 1/2 |
55.875 |
--- |
--- |
15.875 |
18.14 |
8 |
Q |
56.5 |
18 |
16 |
16.5 |
18.34 |
8.25 |
Q 1/2 |
57.125 |
18.25 |
--- |
7.125 |
18.54 |
8.5 |
Q 3/4 |
57.75 |
18.5 |
17 |
17.75 |
18.75 |
8.75 |
R 1/4 |
58.375 |
18.75 |
--- |
18.375 |
18.95 |
9 |
R 3/4 |
59 |
19 |
18 |
19 |
19.15 |
9.25 |
S 1/4 |
59.625 |
19.25 |
--- |
19.625 |
19.35 |
9.5 |
S 3/4 |
60.25 |
19.5 |
19 |
20.25 |
19.56 |
9.75 |
T 1/4 |
60.875 |
19.75 |
--- |
20.875 |
19.76 |
10 |
T 1/2 |
61.5 |
20 |
20 |
21.25 |
19.96 |
10.25 |
U |
62.125 |
20.25 |
21 |
22.125 |
20.17 |
10.5 |
U 1/2 |
62.75 |
20.5 |
22 |
22.75 |
20.37 |
10.75 |
V 1/4 |
63.375 |
--- |
--- |
23.375 |
20.57 |
11 |
V 1/2 |
64 |
20.75 |
23 |
24 |
20.78 |
11.25 |
W 1/4 |
64.625 |
--- |
--- |
24.625 |
20.98 |
11.5 |
W 3/4 |
65.25 |
21 |
24 |
25.25 |
21.18 |
11.75 |
X 1/4 |
65.875 |
--- |
--- |
25.875 |
21.39 |
12 |
Y |
66.5 |
21.25 |
25 |
26.5 |
21.59 |
12.25 |
Y 1/2 |
67.125 |
21.5 |
--- |
27.125 |
21.79 |
12.5 |
Z |
67.75 |
21.75 |
26 |
27.75 |
22.0 |
12.75 |
Z + 1/2 |
68.375 |
--- |
--- |
28.375 |
22.20 |
13 |
Z + 1 |
69 |
22 |
27 |
29 |
Helpful sizing tips
- Fingers on a dominant hand are generally slightly larger than on non-dominant hands— make sure you measure the right finger on the correct hand!
- Rings with wider bands will fit a bit tighter. Consider selecting one 1/4 to 1/2 size up from your normal ring size.If you plan to measure one of your partner's rings, try to measure one with a similar width as the ring you want to purchase.
- For stacking rings: for a more comfortable fit, consider selecting one 1/4 to 1/2 size up from your normal ring size.
- Make sure the finger is at normal body temperature — fingers can shrink or expand when hot or cold.
- Your fingers tend to change size throughout the day — the best time to measure your finger is the end of the day.
- If your knuckle is bigger, take 2 measurements and choose a size in between — ring needs to fit over knuckle but not be too loose or it will shift around.
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Made with recycled precious metals
We use recycled metals derived from post-consumer sources, including recycled jewelry and industrial products. The goal is to reduce or even better eliminate the need for additional mining of precious metals. Learn more about the different precious metals we use in our jewelry and their pros and cons.

Ready to gift or enjoy
Your jewelry comes in a lovely gift box, ready to gift, propose or enjoy.