Yes, I did try to advise you on the method of formatting a museum collection but not in the way that you have done it. All I ask is for you not to put my name against your method. Museum collections are not recorded in the way that you are doing it, but you are perfectly entitled to do it the way you want.
The problems will surface as your collection grows and people 'enter' your Virtual Museum. They do not visit on the basis of what an artefajct is made of...steel, for instance. The fact that an item is made of steel is only a part of its description and if you catorgarise it with the word steel, then it is going to get lost in a sea of items made of steel. I hope you understand what I am talking about because I very much want you to succeed in you endeavours.
Very briefly, your collections should not be grouped by what they are made of but by what category they fall under. You can have as many categories as you like and any one of them might contain items that are made of steel. An artifact's file will tell you what it is made of but even the file will come under a broader category. I am no expert at organising information on computer but for a virtual museum you would have to use some form of tree/root system to find your way around it.
Example : You already have the name of your establishment...Hebburn Virtual Museum. Let us assume that it has a number of rooms dedicated to certain themes, i.e. Social History, Military History, Natural History, Industrial History, etc. So these are the main catagories under which your artifacts will be grouped. However, there can and will be subheadings to allow the visitor to home in on his/her specific interest....for instance, you might have a category headed Industrial. For the purpose of Hebburn's history, this might be subheaded by a list of major companies like, Palmers, Reyrolles, etc. Now you can raise a file under these more specific headings.
There are a number of other things to contend with but enough to be going on with. You can still do it your way but all I ask is for you not to suggest that I pointed you in that direction. I only hope that you understand that all I would like to see is that your idea flourishes and doesn't end up in some dusty corner of the website, unused and unvisited.