"We know of about five burglaries where gum has been taken, but there could be more that have not be reported."
"It's a valuable commodity and we believe it's being exported to the Chinese market."
While the bulk of the haul was unpolished gum there were some pieces that had been finished to a high quality.
Constable Bigwood urged anyone with private kauri gum collections to ensure they were secure and said museums in the region should also review their security.
In May thieves raided cabinets at Waiharara's Gumdiggers' Park, 24km north west of Kaitaia, and stole about 80 pieces of polished gum. At the time owner John Johnson saw two balaclava-clad men who charged at and threw kauri gum at him.
He went to Whangarei police station yesterday to see if any of his precious pieces were among the haul, but had no luck.
Mr Johnson said there was definitely a market for the gum.
It was popular in the Asian market and said there were a lot of collectors around.
This week Kaitaia man Heta Lennod Lloyd, 24, admitted stealing the gum from Gumdiggers' Park when he appeared in Kaitaia District Court. Lloyd admitted breaking into the park, with an unknown associate.
Following yesterday's search warrants Raymond Te Huia Coe, 30, from Oakleigh, appeared in Whangarei District Court yesterday on a charge of burglary, while Weiquan Yang, 43, butcher from Whangarei, entered no plea to a charge of receiving.
Both were remanded on bail to October 12.