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Round|Natural|GIA

0.77ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 6511380100

Certificate GIA 6511380100

Diamond specifications and retailer prices

From £625 GBP
As of November 4, 2026
Save £743 GBP (54%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,919 GBP at NZ Jewellers · As of September 26, 2026
View at NZ Jewellers

About this 0.77ct natural round diamond

This 0.77ct natural round sits in the just-under-one-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6511380100. Listed at 14 retailers as of November 4, 2026, with a 119% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.77
Carat
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6511380100
Dimensions5.85 × 5.82 × 3.64 mm
L/W Ratio1.01
Top View
5.85 mm5.82 mm0.77 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6511380100
Side View
Table 58.0%CrownGirdle: MED-SLIPavilionCulet: NoneDepth 62.4%

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 4
Current: £863 GBP|Low: £625 GBP|High: £1,458 GBP|Avg: £886 GBP|-1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 7£625 GBP
Retailer 9£632 GBP
Retailer 6£665 GBP
Retailer 8£685 GBP
Retailer 5£748 GBP
Retailer 4£752 GBP
Retailer 1£863 GBP
Retailer 2£1,042 GBP
Retailer 3£1,368 GBP

39 data points across 9 retailers

14 retailers£625 GBP to £1,368 GBP

A
Cheapest Retailer
-
£625 GBP
Final sale: no returns
A
Retailer 2
-
£632 GBP
View
A
Retailer 3
-
£665 GBP
View
A
Retailer 4
-
£685 GBP
View
Retailer 5
-
£713 GBP
View
Price last confirmed 29 days ago
Retailer 6
-
£713 GBP
View
Price last confirmed 29 days ago
Retailer 7
-
£740 GBP
View
Price last confirmed 38 days ago
A
Retailer 8
-
£748 GBP
View
A
Retailer 9
-
£752 GBP
View
Retailer 10
-
£822 GBP
View
Price last confirmed 38 days ago
A
Retailer 11
-
£863 GBP
View
B+
Retailer 12
-
£1,042 GBP
View
B+
Retailer 13
-
£1,368 GBP
View
Most Expensive
NZ Jewellers
fb63791a-a73e-461f-9b96-e49d6304634b · Sep 26
£1,919 GBP
$2,583 USD
View
Price last confirmed 40 days ago
13 more retailers have this diamond
Prices start from £625 GBPSave up to £743 GBP

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
0.77ct Round
£625 GBP