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Radiant|Natural|GIA

1.70ct D SI1 Radiant Natural Diamond

VG • D/SI1 • GIA 12555259

Certificate GIA 12555259

Diamond specifications and retailer prices

From £8,720 GBP
A$17,974 AUD
As of November 1, 2026
Save £1,864 GBP (18%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £10,584 GBP at 77 Diamonds · As of November 1, 2026
View at 77 Diamonds

About this 1.7ct natural radiant diamond

This 1.7ct natural radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 12555259. Listed at 2 retailers as of November 1, 2026, with prices from £8,720 to £10,584, a £1,864 spread on the same certified stone. 77 Diamonds lists it at £10,584. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.70
Carat
D
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishGood
SymmetryGood
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 12555259
Dimensions7.66 × 6.24 × 4.16 mm
L/W Ratio1.23
Top View
7.66 mm6.24 mm1.70 ctD / SI1
OriginNatural
CutVery Good
PolishGood
SymmetryGood
FluorescenceMedium
CertificateGIA 12555259
Side View
Table 71.0%CrownGirdlePavilionCuletDepth 66.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 1
Current: £10,584 GBP|Low: £10,481 GBP|High: £10,726 GBP|Avg: £10,639 GBP|+1.0%
November 1, 2026
77 Diamonds£10,584 GBP

33 data points across 1 retailer

2 retailers£8,720 GBP to £10,584 GBP

B
Cheapest Retailer
-
£8,720 GBP
A$17,974 AUD
Most Expensive
C
77 Diamonds
RADMB2EWNCGRW · Nov 1
£10,584 GBP
View
1 more retailer has this diamond
Prices start from £8,720 GBPSave up to £1,864 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.

B
1.70ct Radiant
£8,720 GBP