Yes. You already have an item ID, "0x0000000000000000:0x7002B018"
The "0x0000000000000000" is a unique item identifier (in this case not specified) and the "0x7002B018" is the generic item id part.
If the generic part is 0, then the unique part MUST be specified, otherwise you can use the generic part. In this case, the easiest thing to do is just use the entire "0x0000000000000000:0x7002B018".
To use the itemID to create a shortcut, you have to replace the ":" with a "," like "0x0000000000000000,0x7002B018"
You can use that item ID to create a shortcut and then use the getItem method of the shortcut to get an Item. I would not suggest using the GetName method of the Item object, rather use GetItemInfo() to get an ItemInfo structure and use the GetName() from that (the GetName on the Item is a deprecated function and may not be supported at some point).
I will forgo the parsing and just assign the id to a variable, but you should be able to parse it easily enough.
Code:
local itemId="0x0,0x7002B018"
local name="undefined"
local sc=Turbine.UI.Lotro.Shortcut(Turbine.UI.Lotro.ShortcutType.Item,itemId)
if sc~=nil then
local item=sc:GetItem()
if item~=nil then
local ii=item:GetItemInfo()
if ii~=nil then
name=ii:GetName()
end
end
end
In this case, name="Medallion". Of course, you would want some error messages if sc, item or ii were ever nil, etc. but you should get the gist.