CaratHunter
Plans
Emerald|Natural|GIA

0.51ct E SI1 Emerald Natural Diamond

EX • E/SI1 • GIA 5553458174

Certificate GIA 5553458174

Diamond specifications and retailer prices

From £390 GBP
As of November 4, 2026
Save £116 GBP (23%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £506 GBP at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 0.51ct natural emerald diamond

This 0.51ct natural emerald sits in the half to three-quarter carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5553458174. Listed at 6 retailers as of November 4, 2026, with prices from £390 to £506, a £116 spread on the same certified stone. Blue Nile lists it at £506. 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

0.51
Carat
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5553458174
Dimensions5.58 × 3.66 × 2.43 mm
L/W Ratio1.52
Culet sizeNone
Key to symbols
Twinning Wisp
Top View
5.58 mm3.66 mm0.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5553458174
Side View
Table 59.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.4%

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: £506 GBP|Low: £341 GBP|High: £534 GBP|Avg: £441 GBP|-5.3%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 5, 2026
Retailer 6£390 GBP
Retailer 5£398 GBP
Retailer 3£405 GBP
Retailer 4£435 GBP
Retailer 2£483 GBP
Blue Nile£506 GBP

41 data points across 6 retailers

6 retailers£390 GBP to £506 GBP

A
Cheapest Retailer
-
£390 GBP
A
Retailer 2
-
£398 GBP
View
Final sale: no returns
A
Retailer 3
-
£405 GBP
View
A
Retailer 4
-
£435 GBP
View
B+
Retailer 5
-
£483 GBP
View
Most Expensive
B+
Blue Nile
29346199 · Nov 5
£506 GBP
$681 USD
View
5 more retailers have this diamond
Prices start from £390 GBPSave up to £116 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
0.51ct Emerald
£390 GBP