Homeowners policies have 2 types of medical coverages.
Medical Payments and Liability.
Medical Payments is usually no more than 5000. It pays for medical bills (for non-residents of the household) that are injured on the property. This coverage pays regardless of fault. It does not pay for pain/suffering or lost wages. It's sort of a make nice coverage. For example, I am helping you build a playhouse for your child. I miss the nail and hammer my thumb instead breaking it and requiring a trip to the ER or I trip over my own feet walking down your steps (that have nothing wrong with them).
Liability coverage is usually seen in amounts of 100,000 or 300,000. This pays for bodily injury/property damage that happens as a result of your negligence. This coverage will consider pain/suffering and lost wages. For example, your dog bites me or I trip on your loose step and fall injuring myself.
As far as the jewelry goes -- if you have valuable pieces you will want to speak to your agent about scheduling the jewelry onto your policy. This is done with a "floater" or an Inland Marine policy. The homeowners policy does provide limited coverage for jewelry, but if you have really nice pieces - its a good idea to endorse them onto your policy.
As far as land goes -- the homeowners policy does not provide coverage for land. It is specifically excluded. So there is no reason to include the value of your lot in the coverage amount.
How much insurance to get?
Coverage A is the amount of $ to rebuild your home. This coverage pays for the residential structure itself. You want your coverage A limit to be enough to rebuild your house exactly as it is - with the same siding and finishes. You want the cost for a General Contractor to come in and completely rebuild. You can also purchase an endorsement that will automatically increase this coverage limit each year. This is a good thing to have as the cost of building materials increases each year. A house that cost 95,000 to build 5 years ago may cost 100,000+ to build now.
The other coverage limits (B,C,D) are a % of the Coverage A limit.
Coverage B- is for other structures on the property. This includes swimming pools, outbuildings, fences.
Coverage C - is for contents. Your personal property. A rule of thumb- if you would take it with you in a move -- it's contents. So your clothing, this swing set in the yard, the lawn mower, the dishes etc.
Coverage D - Loss of Use. Should you suffer a loss and your home be damaged to the point that you can not live in it- Coverage D kicks in to help out with your increased expenses. For example- you have a grease fire and have to rent an apartment for a month while your home is rebuilt. You continue to pay your mortgage but now have the 1 month apartment rent. The rent is an increased expense. Coverage D would pay for this.
Coverage E- Liability coverage (discussed above)
Coverage F- Medical Payments coverage.
This is pretty general information and can be affected by the type of policy you purchased. Your agent can give you specific information about your policy.