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Oval|Natural|GIA

0.66ct H SI1 Oval Natural Diamond

GD • H/SI1 • GIA 1555829801

Certificate GIA 1555829801

Diamond specifications and retailer prices

From €522 EUR
$585 USD
As of November 1, 2026
Save €129 EUR (20%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: €651 EUR at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 0.66ct natural oval diamond

This 0.66ct natural oval sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1555829801. Listed at 4 retailers as of October 31, 2026, with prices from €522 to €651, a €129 spread on the same certified stone. Blue Nile lists it at €651. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.66
Carat
H
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryGood
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 1555829801
Dimensions6.62 × 4.91 × 3.12 mm
L/W Ratio1.35
Culet sizeNone
Key to symbols
Cloud, Crystal
Top View
6.62 mm4.91 mm0.66 ctH / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryGood
FluorescenceStrong
CertificateGIA 1555829801
Side View
Table 59.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 63.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: €651 EUR|Low: €522 EUR|High: €675 EUR|Avg: €593 EUR|-3.6%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
November 2, 2026
Retailer 3€522 EUR
Retailer 4€565 EUR
Retailer 2€633 EUR
Blue Nile€651 EUR

41 data points across 4 retailers

4 retailers€522 EUR to €651 EUR

A
Cheapest Retailer
-
€522 EUR
$585 USD
B+
Retailer 2
-
€565 EUR
SGD 857 SGD
View
B+
Retailer 3
-
€633 EUR
£559 GBP
View
Most Expensive
B+
Blue Nile
29775550 · Oct 31
€651 EUR
$730 USD
View
3 more retailers have this diamond
Prices start from €522 EURSave up to €129 EUR

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
0.66ct Oval
€522 EUR