Crystal boba is agar jelly — clear, springy, ready in minutes and around 70 kcal per 100g. Tapioca pearls are cassava starch — black, dense, chewy, boiled for half an hour and around 200 kcal per 100g. Pick crystal for fruit teas, tapioca for milk teas.
Side by side
| Crystal boba | Tapioca pearls | |
|---|---|---|
| Base ingredient | Agar or konjac | Cassava starch |
| Colour | Clear to amber | Black or brown |
| Texture | Springy with a slight snap | Dense, sticky chew |
| Prep time | Rinse and soak, 5 minutes | Boil 25–30 min, rest 20 |
| Calories per 100g | 60–80 kcal | 180–220 kcal |
| Holds in a cold drink | Hours without hardening | Hardens after 4 hours |
| Cost per serving | Slightly higher | Lower |
| Best with | Fruit teas, green tea, yakult drinks | Milk teas, brown sugar, taro |
When crystal boba wins
- You want the drink to stay good for hours — at an event or a picnic, tapioca will have hardened long before crystal boba does.
- You are serving a light, clear drink where black pearls would look heavy.
- Calories matter: a serving is roughly 35 kcal against 100.
- You have no time to boil anything.
When tapioca wins
- You want the classic bubble tea experience — the QQ chew is the point.
- The drink is a brown sugar or milk tea, where crystal boba disappears.
- You are serving warm.
- Budget: tapioca is the cheaper topping per cup.
Can you use both?
Yes, and many shops do. A common pairing is tapioca plus crystal boba in a brown sugar milk tea, or crystal plus popping boba in a fruit tea for two contrasting textures. Just keep the total topping to about 60–80g per 500ml cup or the drink gets hard to drink through a straw.
People also ask
- What are the bubbles in bubble tea made of?
- Tapioca pearls: cassava starch, water and brown sugar. The name itself comes from the foam on a shaken tea. Read the full answer
- What is popping boba made of?
- Fruit juice sealed in a thin seaweed-derived alginate skin, set with calcium — no tapioca and no gelatin. Read the full answer
- What is crystal boba?
- Translucent agar jelly pearls with a springy bite and roughly a third of the calories of tapioca. Read the full answer
- How is popping boba different from tapioca?
- Popping boba bursts with juice and needs no cooking; tapioca is boiled starch with a chewy bite and works hot. Read the full answer
Building a boba business?
Our hands-on bubble tea training in London covers drink prep, machines, costing and menu build, taught by the team running our Fulham bar every day.
