The price of natural pearls is more expensive than the price of man made pearls.
This is an Indonesian student translating ‘harganya mahal‘!
We see what you mean. But in IELTS if you want a better score for vocabulary (LR)1, and if you want to be more accurate with meaning (FC, TA, TR, CC)1, then you need better collocation (LR)1.
First of all ‘price‘ can be ‘high‘ or ‘low‘:
Products and services, meanwhile, can be ‘cheap’ or ‘expensive’:
We can use the same collocation to talk about this bottle of wine:
If you say the price is expensive, strictly speaking you are saying that a sequence of numbers (in this case $38,420) is expensive! The wine is expensive, not the numbers!
Here’s a song illustrating common collocations involving ‘price’.
(See IELTS public band descriptors)