Does anyone know how to.............

[dave r]

Hi Dora, I don't know how things are done in the U.S. but here insuring a collection is a nightmare. Most insurers will only insure it as a collection i.e. if part is destroyed they will not pay out, only if the entire collection is destroyed and even then they will want evidence of what you had.This means photographing every single specimen. There are some shell dealers who will assess a collection for you but they usually charge a lot. Likewise there are a few insurance companies that specialise in collections but the premiums for those are astronomical. You can insure individual specimens of particular rarity but, like antiques, the premiums are sky high. What most people do here in England is make sure the house contents insurance is sufficient to cover the loss of a collection.
Sorry I can't be of more help.
Dave