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Round|Natural|GIA

6.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2544916426

Certificate GIA 2544916426

Diamond specifications and retailer prices

From $105,473 SGD
$82,504 USD
As of November 2, 2026
Save $26,512 SGD (20%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $143,595 SGD at Yorxs · As of October 22, 2026
View at Yorxs

About this 6.51ct natural round diamond

This 6.51ct natural round sits in the over five carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2544916426. Listed at 9 retailers as of November 2, 2026, with a 25% 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

6.51
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle34.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 2544916426
Dimensions11.83 × 11.93 × 7.46 mm
L/W Ratio1.01
Star length50%
Top View
11.83 mm11.93 mm6.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 2544916426
Side View
Table 59.0%Crown 34.5°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 62.8%

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 2
Current: $131,985 SGD|Low: $105,473 SGD|High: $143,924 SGD|Avg: $120,163 SGD|+1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Yorxs
November 2, 2026
Retailer 5$105,473 SGD
Retailer 3$109,807 SGD
Retailer 2$110,757 SGD
Retailer 4$116,116 SGD
Retailer 1$131,985 SGD
Yorxs$143,595 SGD

38 data points across 6 retailers

9 retailers$105,473 SGD to $131,985 SGD

A
Cheapest Retailer
-
$105,473 SGD
$82,504 USD
Retailer 2
-
$109,170 SGD
$85,396 USD
View
Price last confirmed 10 days ago
Retailer 3
-
$109,807 SGD
₹8,180,371 INR
View
Price last confirmed 11 days ago
Retailer 4
-
$110,193 SGD
$86,196 USD
View
Price last confirmed 9 days ago
B+
Retailer 5
-
$110,757 SGD
$86,637 USD
View
Retailer 6
-
$116,116 SGD
$90,829 USD
View
Price last confirmed 14 days ago
Retailer 7
-
$122,117 SGD
$95,523 USD
View
Price last confirmed 11 days ago
B+
Retailer 8
-
$131,985 SGD
£81,293 GBP
View
Most Expensive
Yorxs
530201343 · Oct 22
$143,595 SGD
€106,975 EUR
View
Price last confirmed 11 days ago
8 more retailers have this diamond
Prices start from $105,473 SGDSave up to $26,512 SGD

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
6.51ct Round
$105,473 SGD