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5.51ct L SI1 Round Natural Diamond

EX • L/SI1 • GIA 1565176145

Certificate GIA 1565176145

Diamond specifications and retailer prices

From $60,948 SGD
As of November 6, 2026
Save $9,375 SGD (13%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $70,323 SGD at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 5.51ct natural round diamond

This 5.51ct natural round sits in the over five carat band, graded L colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1565176145. Listed at 3 retailers as of November 5, 2026, with prices from $60,948 to $70,323, a $9,375 spread on the same certified stone. Blue Nile lists it at $70,323. 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

5.51
Carat
L
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1565176145
Dimensions11.20 × 11.26 × 7.04 mm
L/W Ratio1.01
Top View
11.20 mm11.26 mm5.51 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1565176145
Side View
Table 58.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $70,323 SGD|Low: $60,948 SGD|High: $70,323 SGD|Avg: $66,319 SGD
Blue Nile
Retailer 2
Retailer 3
November 6, 2026
Retailer 2$60,948 SGD
Retailer 3$66,800 SGD
Blue Nile$70,323 SGD

35 data points across 3 retailers

3 retailers$60,948 SGD to $70,323 SGD

B+
Cheapest Retailer
-
$60,948 SGD
B
Retailer 2
-
$66,800 SGD
View
Most Expensive
B
Blue Nile
30262738 · Nov 5
$70,323 SGD
$55,056 USD
View
2 more retailers have this diamond
Prices start from $60,948 SGDSave up to $9,375 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.

B+
5.51ct Round
$60,948 SGD