Why Are (Destoned) Pitted Extra Virgin Olive Oils So Rare?
Although no official global production statistics exist, industry experts and milling specialists generally agree that well under 1% of the world’s extra virgin olive oil is produced using the destoning method. Given annual global production of approximately 3–3.5 million tonnes, this represents only a tiny fraction of total output. The lack of widespread adoption reflects the significant investment and expertise required rather than any legal or regulatory limitation.
Most extra virgin olive oils are produced by crushing the entire olive—skin, flesh, pulp and stone—before the oil is extracted.
Pitted, or destoned, extra virgin olive oil follows a very different path.
Before milling begins, each olive passes through specialised equipment that separates the stone from the fruit. Only the olive pulp, skin and a small portion of the seed tissues are processed. It is a far more demanding technique that requires dedicated machinery, meticulous calibration and producers willing to sacrifice efficiency in pursuit of quality.
For this reason, pitted extra virgin olive oils remain one of the rarest categories in the olive oil world.
What Is Pitted (Destoned) Extra Virgin Olive Oil?
Pitted (also called destoned or denocciolato in Italian) extra virgin olive oil is produced by mechanically removing the pit before the olives are crushed. Unlike conventional extraction, where the entire olive enters the crusher, the destoning process separates the woody stone while preserving the olive flesh, from which the oil is extracted. The process is entirely mechanical and takes place within hours of harvesting, just like the production of high-quality conventional extra virgin olive oil. No additives are used, and the resulting oil still meets all the legal requirements to be classified as extra virgin olive oil.
Why Is It So Rare?
The short answer is simple: it is considerably more difficult and more expensive to produce.
Several factors contribute to its rarity:
- Specialised equipment: Destoning requires dedicated machinery that many olive mills simply do not own.
- Lower extraction yields: Removing the stone generally reduces processing efficiency and often results in lower oil recovery, depending on the cultivar and ripeness.
- Slower production: The additional processing step reduces throughput during harvest, when every hour matters.
- Higher production costs: Extra equipment, labour and lower yields increase production costs significantly.
- Not suitable for every olive variety: Some cultivars respond exceptionally well to destoning, while others may lose desirable structural characteristics.
Although no official global production statistics exist, industry experts and milling specialists generally agree that well under 1% of the world’s extra virgin olive oil is produced using the destoning method. Given annual global production of approximately 3–3.5 million tonnes, this represents only a tiny fraction of total output. The lack of widespread adoption reflects the significant investment and expertise required rather than any legal or regulatory limitation.
What Difference Does Removing the Stone Make?
The olive stone is largely composed of woody lignified material. During conventional crushing, fragments of the stone become part of the olive paste. When the stone is removed before extraction, the characteristics of the resulting oil often change.
Scientific studies have shown that destoning can influence:
- aromatic intensity
- volatile compound composition
- bitterness and pungency
- texture and mouthfeel
- extraction yield
- oxidative stability
Importantly, these effects vary considerably according to the olive variety, harvest maturity and milling conditions.
There is no universal rule that pitted oils always contain more polyphenols or always taste milder. Instead, the technique changes how each cultivar expresses itself.
A More Refined Sensory Profile
What many producers appreciate most about destoned oils is their remarkable purity. Without the woody influence of crushed pits, many pitted oils display:
- exceptionally clean aromas
- greater fruit definition
- silky, creamy texture
- elegant mouthfeel
- refined bitterness
- balanced pepperiness
- long, harmonious finish
For delicate or highly aromatic cultivars, destoning can allow floral, herbaceous and fresh fruit notes to become more expressive. Rather than overpowering the palate, the oils often feel more precise and refined.
Does Destoning Increase Polyphenols?
This is one of the most common misconceptions. The answer is not necessarily.
Research has demonstrated that the effect of destoning on phenolic compounds depends on numerous variables, including:
- olive variety
- harvest timing
- fruit maturity
- milling technology
- oxygen exposure
- malaxation conditions
Some studies have reported increased concentrations of certain phenolic compounds, while others observed little difference or even reductions depending on the cultivar. For this reason, polyphenol content should always be verified through independent laboratory analysis rather than assumed based on the extraction method alone.
Why Do So Few Producers Make Them?
Harvest season is a race against time. Every additional processing step increases complexity during one of the busiest periods of the year. For many commercial mills, producing larger volumes efficiently is essential. Destoning, however, requires producers to prioritise craftsmanship over volume. It is generally chosen by estates focused on expressing a specific olive variety or pursuing a particular sensory style rather than maximising production. This explains why many of Italy’s finest pitted oils come from relatively small producers who have invested heavily in specialised milling technology.
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