Round|Natural|GIA

0.77ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2556062171

Certificate GIA 2556062171

Diamond specifications and retailer prices

From £769 GBP
$1,030 USD
As of October 26, 2026
Save £717 GBP (48%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,841 GBP at NZ Jewellers · As of October 3, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2556062171. Listed at 12 retailers as of October 26, 2026, with a 93% 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2556062171
Dimensions5.90 × 5.86 × 3.65 mm
L/W Ratio1.01
Star length50%
Top View
5.90 mm5.86 mm0.77 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556062171
Side View
Table 56.0%Crown 36°GirdlePavilion 40.6°Culet: NoneDepth 62.2%

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: Oct 26
Current: £947 GBP|Low: £755 GBP|High: £1,486 GBP|Avg: £951 GBP|+13.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 7£755 GBP
Retailer 8£769 GBP
Retailer 5£911 GBP
Retailer 1£947 GBP
Retailer 6£987 GBP
Retailer 3£1,014 GBP
Retailer 2£1,205 GBP
Retailer 4£1,486 GBP

40 data points across 8 retailers

12 retailers£769 GBP to £1,486 GBP

Retailer 1
-
£755 GBP
$1,011 USD
Price last confirmed 32 days ago
Retailer 2
-
£755 GBP
$1,011 USD
View
Price last confirmed 23 days ago
A
Retailer 3
-
£769 GBP
$1,030 USD
View
Retailer 4
-
£871 GBP
$1,167 USD
View
Price last confirmed 31 days ago
B+
Retailer 5
-
£911 GBP
$1,220 USD
View
B+
Retailer 6
-
£947 GBP
View
Retailer 7
-
£987 GBP
A$2,035 AUD
View
Price last confirmed 27 days ago
B+
Retailer 8
-
£1,014 GBP
€1,294 EUR
View
B+
Retailer 9
-
£1,205 GBP
ZAR 26,092 ZAR
View
B
Retailer 10
-
£1,486 GBP
View
Retailer 11
-
£1,841 GBP
$2,467 USD
View
Price last confirmed 34 days ago
Most Expensive
NZ Jewellers
71f32a5b-92d7-457c-8b37-3764316804e8 · Oct 3
£1,841 GBP
$2,467 USD
View
Price last confirmed 28 days ago
11 more retailers have this diamond
Prices start from £769 GBPSave up to £717 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
£769 GBP