Opal
Alpha acid
5–14%
Beta acid
3.5–5.5%
Total oil
0.8–1.3 mL
Germany
Aurum
Alpha acid
3.5–5.7%
Beta acid
3.1%
Total oil
0.5–1.7 mL
Germany
Key differences
When to pick Opal
- Higher alpha acid - stronger bittering
- Higher beta acid - smoother, longer-lasting bitterness
- Versatile - works for both bittering and aroma
When to pick Aurum
- Aroma-focused - ideal for dry hopping
- Richer, more complex aroma profile
Aroma profile and use
Shared aromas
CitrusSpicyFloralHerbal
Only in Opal
Black currantAnise
Only in Aurum
FruityMildEarthyNoble
Property
| Property | Opal | Aurum |
|---|---|---|
| Alpha acid | 5–14% | 3.5–5.7% |
| Beta acid | 3.5–5.5% | 3.1% |
| Co-humulone | 13–34% | 20–23% |
| Total oil | 0.8–1.3 mL | 0.5–1.7 mL |
| Myrcene | 20–45% | - |
| Humulene | 30–50% | - |
| Caryophyllene | 8–15% | - |
| Farnesene | 0–1% | - |
| Origin | Germany | Germany |
| Purpose | Dual purpose | Aroma |
Styrian Golding