Rougié Duck Foie Gras Bloc vs Diamant Noir Whole Duck Terrine

Rougié Duck Foie Gras Bloc 180g costs £16.58, while Diamant Noir Whole Duck Foie Gras Terrine 180g costs £23.39 in the 11 October 2026 catalogue snapshot. Both are preserved, ready-to-serve duck products of the same weight, but one is a bloc and the other is sold as whole duck foie gras terrine. Choose Rougié for the lower displayed pack price and bloc format. Choose Diamant Noir when the whole-duck terrine format is central to the occasion. The current gap is £6.81 per jar, before delivery, and neither product needs pan-searing.

Key takeaways

• Both products are 180g ready-to-serve duck preparations.
• The Rougié bloc costs £6.81 less per jar.
• Rougié is £9.21 per 100g; Diamant Noir is £12.99 per 100g.
• The formats differ, so price is only one part of the decision.

What is the main difference? for Rougié Duck Foie Gras Bloc vs Diamant Noir Whole Duck Terrine

The Rougié product is a duck foie gras bloc in a Weck jar. The Diamant Noir product is presented as a whole duck foie gras terrine in a glass jar. Both are listed for chilled slicing and both weigh 180g, but whole and bloc are not interchangeable labelling terms.

French consumer guidance describes whole foie gras as a preparation made from a whole liver or one or more whole lobes. Bloc is reconstituted foie gras with seasoning. This comparison therefore measures two ready-to-serve products with the same weight but different formats.

How much does each option cost per person?

Dividing either 180g jar into four equal 45g portions gives an estimated product cost of £4.15 per person for Rougié and £5.85 for Diamant Noir. The difference is about £1.70 per person. Delivery, bread and accompaniments are excluded.

When does the Rougié bloc make more sense?

Choose Rougié when you want four neat portions at the lower total and unit cost. It is the more economical product in this same-weight comparison. Its current listing describes a smooth bloc with Armagnac and a Weck jar designed for chilled slicing.

When does the Diamant Noir terrine make more sense?

Choose Diamant Noir when the whole-duck terrine format is part of the buying decision. The current listing names duck foie gras, salt, Armagnac, pepper, sugar, sodium ascorbate and sodium nitrite. Check the delivered label before serving, especially for ingredients, allergens and storage.

Can either product be pan-seared?

These listings present both jars as ready-to-serve products. Chill and slice them. Do not apply a raw-liver searing method. For a caramelised pan-seared starter, choose raw foie gras escalopes or a raw whole lobe whose label supports that preparation. Start broader research with the foie gras guide. For product-specific follow-up, see the Diamant Noir serving guide and the Rougié 180g bloc serving guide.

Final verdict

Rougié wins on current price, saving £6.81 per 180g jar. Diamant Noir is the format-led choice when whole duck terrine is specifically required. The condition that reverses the value recommendation is format: if whole foie gras matters more than saving £1.70 per estimated portion, select Diamant Noir.

Frequently asked questions

Are these products the same weight?

Yes. Both current listings are 180g, which makes their pack and unit prices directly comparable.

Which product is cheaper per 100g?

Rougié is £9.21 per 100g and Diamant Noir is £12.99 per 100g, based on prices checked on 11 October 2026.

Are bloc and whole terrine the same?

No. They are different preparation and labelling formats. Read the product name, ingredient list and current pack before treating them as substitutes.

Sources

• Beleaev: Rougié Duck Foie Gras Bloc 180g
• Beleaev: Diamant Noir Whole Duck Foie Gras Terrine 180g
• French DGCCRF: foie gras product designations

Current catalogue references

For current catalogue references, prices are the displayed product prices captured on 11 October 2026. Delivery is excluded, and availability may change.