how to spot suspect uncured rock?

[fugu]

i have just recieved a shipment of live rock, some of it has white deposits on it and black algea? it smells ok but i have read that white deposits are a signal for alarm, could these be calcium deposits or is this just uncured rock.
again no smell of putrefaction is present any ideas?
thankyou in advance.

 

[@knight]

what type of live rock is it?

 

[mr . salty]

Are the white spots like a slime.or could they be chipped off coraline from the shipping?? Smell and white spider webs are the two main signs of uncured rock.How many lbs did you get,and how many gallons is the tank you are putting it in to? Also,is the tank established,or in the cycle??

 

[fugu]

it is indopacific live rock from thailand. there is only about 30lbs which is to go into a cycling sytem. the system is 75 gallons and has been inoculated with substrate from an established tank. it has been running for two weeks. i have bought live rock from tha same source before but it never had the white deposits. the deposits are not slimy.
thanks for the posts.