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Horse profile

Diamondsandrubies (IRE)

3yo filly (at last run, Oct 2015) · Last trainer A P O'Brien · Last owner Mrs Richard Henry Mrs John Magnier
by Fastnet Rock (AUS) out of Quarter Moon (IRE) (Sadler's Wells)
9 runs · 8 courses · from Sep 2014
As at 27 Oct 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
No run recorded since 4 Oct 2015 — 4,041 days ago. Our archive can't say whether the horse is still in training.
Last run Oct 2015 · 12th of 13 3 wins · Curragh (IRE), Chester & Tipperary
KTB Profile

Diamondsandrubies (IRE) is 3 from 9, including a Group 1 win. The biggest win we hold: the Sea The Stars Pretty Polly Stakes at Curragh (IRE) (Jun 2015). Hasn't won since Jun 2015. Each win came on a first visit to the course.

Based on 9 archived runs · updated 27 Oct 2026

Progeny in our archive

Produce record

As a dam, Diamondsandrubies (IRE) has 4 produce in the archive, 4 winners — most wins Pearls And Rubies (USA) (1 win).

The wins came over 5f–1m4f; the highest grade won is Class 4 (Diamond Sparkles (USA)).

ProduceRunsWinsWin tripsBest grade
Pearls And Rubies (USA)915f—
Diamondsareforever (IRE)211m—
Diamond Sparkles (USA)217fClass 4
Riches And Rubies (USA)711m4fClass 5

KTB Speed and Rating

KTB Speed

No KTB Speed figures for this horse. The engine scores GB and Irish racing from Oct 2016; runs elsewhere, or earlier, have no figure.

KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 0 figures from 0 runs · a record, not a forecast

KTB Rating

Best recent KTB Rating 92A the best of the last 3 rated runs · Curragh (IRE), 28 Jun 2015 Official rating 114 at the last run, 1 Aug 2015

What the horse achieved in each race, in pounds on the official-rating scale, from the weight carried, the lengths beaten and the race's own level solved across the archive — never the market, never the official rating as a starting point. The headline is the best of the horse's last three rated runs on that code. A, B or C on a run is how much known form was in that race. What this means →

Flat 7 figures · best 95A · median 91
GoingRunsBestMedianSince 27 Oct 2025
Good to Firm277A76.5—
Good292A91.5—
Soft291A90.5—
Good to Soft1———
DistanceRunsBestMedianSince 27 Oct 2025
1m2f – 1m4f595A91—
1m – 1m1f1———
6f – 7f1———

KTB Rating v1 · batch 3 Oct 2026 · GB & Irish racing only · 7 figures from 7 runs · as at 4 Oct 2026 · a record, not a forecast

Both figures are KTB's own, computed from the archive; no vendor rating enters either. Every run's figure is on its form line below with its grade. Grades measure how much the archive could see, never the merit of the run.

Run style is derived from in-running commentary, which our data provider does not supply for this horse's races.

Pedigree intelligence

Sire
Fastnet Rock (AUS)

Progeny in our archive have won 12.1% of 5,483 runs since Jan 2008 (557 horses).

GoingRunsWinsSRvs sireThis horse
Firm1417.1%−5—
Good to Firm6768712.9%+0.80 from 2
Good1,21614812.2%+0.11 from 3
Good to Soft5727613.3%+1.21 from 1
Soft1,012989.7%−2.41 from 3
Heavy3193711.6%−0.5—
Standard (AW)1,67321713%+0.9—
Distance (all codes)RunsWinsSRvs sireThis horse
Under 6f1081513.9%+1.8—
6f – 7f1,09712611.5%−0.60 from 1
1m – 1m1f1,48417311.7%−0.41 from 1
1m2f – 1m4f1,86424213%+0.92 from 7
1m5f – 2m6758813%+0.9—
2m1f – 2m4f212209.4%−2.7—
2m5f – 3m4112.4%−9.7—
Over 3m200%−12.1—

Flat and jumps together (all codes) · since Jan 2008 · as at 27 Oct 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast

Dam
Quarter Moon (IRE) (Sadler's Wells)

8 siblings in the archive, 6 winners — best of them War Tiger (USA) (2 wins).

The wins came over 7f–1m2f; the highest grade won is Class 4 (War Tiger (USA)).

ProduceRunsWinsWin tripsBest grade
War Tiger (USA)621m1½fClass 4
You'll Be Mine (USA)1017f—
How High The Moon (IRE)1117f—
Born To Be King (USA)717f—
King Of Westphalia (USA)1311m2f—
Dance With Another (IRE)1211m—
Hibernian Warrior (USA)100——
Half Moon (IRE)40——

Record by conditions

GoingRunsWinsSR£1
Good 3 1 33% +6.00
Soft 3 1 33% +4.00
Good to Firm 2 0 0% −2.00
Good to Soft 1 1 100% +1.25

ClassRunsWinsSR£1
Class 1 3 1 33% −0.75

CourseRunsWinsSR£1
Longchamp (FR) 2 0 0% −2.00
Goodwood 1 0 0% −1.00
Curragh (IRE) 1 1 100% +8.00
Epsom Downs 1 0 0% −1.00
Chester 1 1 100% +1.25
Navan 1 0 0% −1.00
Tipperary 1 1 100% +6.00
Leopardstown 1 0 0% −1.00

DistanceRunsWinsSR£1
1m2f – 1m4f 7 2 29% +4.25
1m – 1m1f 1 1 100% +6.00
6f – 7f 1 0 0% −1.00

JockeyRunsWinsSR£1
Seamie Heffernan 6 2 33% +10.00
Ryan Moore 2 1 50% +0.25
Colm O'Donoghue 1 0 0% −1.00

SeasonRunsWinsSR£1
2015 8 3 38% +10.25
2014 1 0 0% −1.00

Splits include every sample, however small — muted rows are under 3 runs. A one-from-one record is a fact, not a trend: read the Runs column before the strike rate.

Form

DateCourseRace PosBtn Wgt ORKTB Jockey SP
2015 · 8 runs
04 Oct 15+21d Longchamp (FR) Prix de l'Opera Longines (3yo+ Fillies & Mares) (Turf) 10f · Good · 13 ran 12/13 3½ 8-11 —— Ryan Moore 14/1
13 Sep 15+43d Longchamp (FR) Qatar Prix Vermeille (3yo+ Fillies & Mares) (Turf) 12f · Very Soft · 9 ran 8/9 1¾ 8-8 —— Colm O'Donoghue 12/1
01 Aug 15+34d Goodwood Qatar Nassau Stakes (British Champions Series) (Fillies' Group 1) Class 1 · 10f · Good To Firm · 9 ran 9/9 1 8-12 11476A Seamie Heffernan 10/3
28 Jun 15+23d Curragh (IRE) Sea The Stars Pretty Polly Stakes (Fillies & Mares) 10f · Good · 9 ran 1/9 8-12 10992A Seamie Heffernan 8/1
05 Jun 15+30d Epsom Downs Investec Oaks (Fillies' Group 1) Class 1 · 12f · Good · 11 ran 4/11 3¼ 9-0 10691A Seamie Heffernan 14/1
06 May 15+18d Chester Arkle Finance Cheshire Oaks (For The Robert Sangster Memorial Cup) (Fillies' Listed) Class 1 · 11.5f · Good To Soft · 10 ran 1/10 9-0 10095A Ryan Moore 5/4F
18 Apr 15+9d Navan Irish Stallion Farms E.B.F. Salsabil Stakes (Fillies' Listed) 10f · Yielding · 9 ran 3/9 ½ 9-0 —91A Seamie Heffernan 5/2J
09 Apr 15+208d Tipperary Book Online At TipperaryRaces.ie Fillies Maiden 9f · Soft · 9 ran 1/9 9-0 —90A Seamie Heffernan 6/1
2014 · 1 run
13 Sep 14 Leopardstown Ballylinch Stud E.B.F. Fillies Maiden 7f · Good To Firm · 13 ran 6/13 2¼ 9-0 —77A Seamie Heffernan 22/1

Quick answers

How many races has Diamondsandrubies won?
Diamondsandrubies (IRE) won 3 of 9 archived starts between 2014 and 2015, a strike rate of 33.3%. Placed 4 times in total (44.4% of starts).
Who trained Diamondsandrubies?
Diamondsandrubies (IRE) was trained by A P O'Brien on the most recent run on record, at Longchamp (FR) on 4 October 2015.
Who is Diamondsandrubies's sire?
Diamondsandrubies (IRE) is by Fastnet Rock (AUS) out of Quarter Moon (IRE), whose sire is Sadler's Wells.
What going does Diamondsandrubies prefer?
Diamondsandrubies (IRE) has the best record on good going: 1 win from 3 starts (33.3%). Only going bands with at least three archived starts are read, so this is a direction rather than a settled preference.
What is Diamondsandrubies's official rating?
Diamondsandrubies (IRE)'s highest official rating on record is 114.
What is Diamondsandrubies's sire's record?
Fastnet Rock (AUS)'s progeny in our archive have won 12.1% of 5,483 runs since Jan 2008 (557 horses), Flat and jumps together.
Who are Diamondsandrubies's siblings?
Out of Quarter Moon (IRE), Diamondsandrubies (IRE) has 8 other produce in our archive, 6 of them winners. Most wins: War Tiger (USA) (2). Highest grade won: Class 4 (War Tiger (USA)). The wins came over 7f–1m2f. As at Oct 2026.
Has Diamondsandrubies produced winners?
As a dam, Diamondsandrubies (IRE) has 4 produce in our archive, 4 of them winners. Most wins: Pearls And Rubies (USA) (1). Highest grade won: Class 4 (Diamond Sparkles (USA)). The wins came over 5f–1m4f. As at Oct 2026.

Record shown from September 2014. Our archive holds racing in Great Britain, Ireland and France from January 2005. Runs in other countries are not in it, and earlier runs are not available from our data provider. In-running comments are available from 2024 onward.