Zambia Starmaya
Washed
WashedMedium
Cherrybook Index
54sparse
Evidence-of-quality score, not a cup score. Sparse signal: 1 of 7 signals on file. Methodology
Price position
US$1.65/ozGBP 11.00 for 250g
this lot $1.65$1.29$2.06
Typical band for this profile $1.29 to $2.06 (washed single-origin lots (other named varieties, retail bags); GBP listings; medium roast in stock). Where it sits
Catalog summary
A washed lot from Zambia, not yet indexed (1 of 7 signals on file) and priced inside the typical band for its listed profile.
Based on the listing and catalog evidence
Price and availability set by the roaster.
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Cherrybook last checked this listing today.
Roaster’s notes
black tea · molasses · cardamom
- Floral
- Sugar and spice
Open the flavor wheel
Mapped from the roaster’s tasting notes to the SCA flavor wheel; Cherrybook’s interpretation of the stated notes, not the roaster’s own categorization.
- Origin
- Zambia
- Producer
- Mount Sunzu Coffee
- Farm / Co-op
- Mount Sunzu Coffee
- Process
- Washed
- Altitude
- —
- Varietals
- Starmaya
- Harvest
- —
- Weight
- 250g
- Bag price
- GBP 11.00
- Price / oz
- US$1.65/oz
- Brew
- —
from the roaster’s storeread by Cherrybook from the listing“estimated” below = inferred, not stated
Price contextmodeled
A modeled range and current prices for comparable listings.
$1.65/oz
typically $1.29 to $2.06
Where it sits
27 washed single-origin lots (other named varieties, retail bags); GBP listings; medium roast in stock
typical band this lot
Broad comparison: 26th percentile of 27 washed single-origin lots (other named varieties, retail bags); GBP listings; medium roast in stock right now.
This group broadens origin, roast or selling market to find enough lots. It does not qualify this coffee for a value recommendation.
What moves this price
cheaper×1.00pricier
- Roaster brand and sourcing×0.78
- Washed process×0.95
- African origin×1.04
- Altitude not listed×0.97
How this estimate works
A statistical model, refit weekly across the in-stock catalog, estimates what a coffee with these listed attributes typically sells for per ounce. Each multiplier compares one trait against the average lot in this market; the roaster line covers brand and sourcing together, which this model cannot separate. Bag size is shown separately, priced at the rate observed across sizes of the same coffee, because it says nothing about the coffee itself. The distribution counts every in-stock listing in the comparison group, with at least 15 listings from three roasters and no roaster supplying more than 60% of it. Decaf, blends, variety segments, processing families and bag formats stay separate. Origin, roast and selling currency can broaden as the group label indicates. Prices are converted to USD per ounce; shipping and differences in tax treatment are not adjusted. The model reads listed attributes only: the quality of the specific lot in the bag is not observable, so a price above the typical band is not evidence of overpricing.
Not listed by the roaster: altitude
Cherrybook Index (CBI)
Evidence-of-quality score, not a cup score. Methodology
54
Sparse signal
Confidence1 of 7 signals on file
Score is heavily shrunk toward 50; treat as a placeholder until more sources arrive.
How confidence affects the score
Coverage measures signal availability, not cup quality. This coffee has 5% of the signal universe on file. Missing sources are dropped, remaining weights are renormalized, and the result is shrunk toward a neutral 50 baseline by 88% so one thin signal cannot carry the score on its own.
The math on file: renormalized base 65.0 shrunk to 51.9 + bonuses = 54.
Missing: SCA grade, Coffee Review, Reddit sentiment, YouTube reviews, On-shop ratings, Cherrybook ratings
- 65/ 100% weightRoaster transparencyProducer / farm / lot disclosure depth
Bonuses applied
- +2Sprudge press coverageThis roaster has been featured by Sprudge
Comps & alternatives
Tasting flight
Compare this with three more lots selected from the catalog.
Brew a set side-by-side. The picks vary along axes that pair with this lot; origin, process, roast, or producer; so you learn the difference, not just drink four good cups.
Reference · About the varietal & origin
About Quarter Horse Coffee
Press · Sprudge
- Build-Outs Of Coffee: Quarter Horse Coffee In Birmingham, UK2022-09-19·sprudge
Quarter Horse Coffee in Birmingham, England.
On YouTube
Meet the roaster on camera
About the roasterInterview
What's the Giesen Industrial Roasting experience like? Neighbourhood Roasters / Quarterhorse Coffee
Giesen Roasting Solutions · 1K views on YouTube
Watch on YouTubeThis video covers Quarter Horse Coffee; it is general roaster coverage.
Cherrybook summary of the video
Quarter Horse Coffee shares their experience scaling production with Giesen industrial roasters, moving from a Giesen 15 to a Giesen 30 and 60. The roasters praise Giesen's reliability, consistency, build quality, and responsive UK-based customer service, noting that the equipment has significantly improved their roasting operations and efficiency.
Inside this video
From Giesen Roasting Solutions:
“Consistent great quality of coffee; we find that sweetness is the main thing that comes out when roasting with a Giesen.”
“It's just helped us to scale. You get to a point and you physically can't roast much more coffee.”
“I think the airflow and pressure profiling is probably also what sets it apart and what we're really happy with.”
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