In accordance to the norms of the Spice Board, the physical characteristics of turmeric are finger like in shape, and forms the secondary rhizomes of the plant Curcuma longa L.
Typical characteristics include:
- Well set,closely grained, free from bulbs (primarily rhizomes) and ill developed, porous rhizomes
- Their shape, length, colour and other characteristics are typical of the variety
As stipulated by the Spice Board, good grades of turmeric must conform to the following specifications:
- Perfectly dry
- Free from damage caused by weevils, moisture, over-boiling or fungus attack
- In a sample of good grade turmeric, only 1-2% by weight of rhizomes will be accepted under the damaged or over boiled clause.