Minerality mysteries remain
Ongoing wine research by Dr Wendy Parr of Lincoln University indicates that while minerality is not a figment of tasters’ sensorial imagination, the source of the perception remains a mystery, and the description should be used with caution in formal wine tasting and judging situations. ‘Minerality’ is used by wine professionals to describe the character of certain wines, with vague references made to wet stones, crushed rock and soil. Regarded variously as a taste, a smell, a trigeminal (mouth-feel) sensation, or all three, until now there’s been little agreement on what is actually meant by this common but enigmatic term, or whether it even exists. Intrigued by the lack of scientific knowledge and the plethora of anecdotal evidence around minerality, Dr Parr collaborated with scientists in France and at Plant and Food Research in New Zealand to investigate what the concept means in Sauvignon Blanc wines, and whether there are cultural differences in perceptions of minerality. Wine professionals from France and New Zealand experienced in the production and tasting of Sauvignon Blanc participated in two sensory studies carried out over two sessions, with wine samples served blind in opaque, standardised glasses in unique order for each participant. Participants evaluated the wines by palate (taste and mouth-feel) alone, smell alone and both palate and smell together. Minerality was perceived by both groups in all cases, and was consistently associated with several wine characteristics, for example citrus. There were more similarities in perception between the groups than differences, implying that wine professionals in France and New Zealand share a mental construct of the concept ‘mineral’, as experienced in Sauvignon Blanc wines. “The concept of minerality in wine is undoubtedly real,” Dr Parr says, “but the source of the perception is still unclear.” It has been variously attributed to acidity, sulphide reduction, and […]