AmethystvsCentennial
Amethyst (aroma) and Centennial (dual purpose) serve different purposes. Comparing acids, aromas and character helps pick the right hop.
Amethyst
Alpha acid
3.5–6%
Beta acid
7–8%
Total oil
0.4–1 mL
Czech Republic
Centennial
Alpha acid
7–12%
Beta acid
3.5–5.5%
Total oil
1–3 mL
United States
Key differences
When to pick Amethyst
- Higher beta acid - smoother, longer-lasting bitterness
- Aroma-focused - ideal for dry hopping
When to pick Centennial
- Higher alpha acid - stronger bittering
- More essential oils - more intense aroma
- More myrcene - pronounced citrus and resinous notes
- Versatile - works for both bittering and aroma
- Richer, more complex aroma profile
Aroma profile and use
Shared aromas
Citrus
Only in Amethyst
EarthySpicy
Only in Centennial
PineFloralGrapefruitTangerine
Property
| Property | Amethyst | Centennial |
|---|---|---|
| Alpha acid | 3.5–6% | 7–12% |
| Beta acid | 7–8% | 3.5–5.5% |
| Co-humulone | 20–28% | 23–30% |
| Total oil | 0.4–1 mL | 1–3 mL |
| Myrcene | 41–43% | 55–65% |
| Humulene | 18–20% | 10–20% |
| Caryophyllene | 5–7% | 5–7% |
| Farnesene | 0–1% | 0–1% |
| Origin | Czech Republic | United States |
| Purpose | Aroma | Dual purpose |