The children don't even speak to each other any more. Jewelry may be an easier problem to resolve. The will, or a supplementary document, can specify who gets what. It can also provide that the jewelry be distributed by selection of the heirs in a series of choices, the order for each series can be determined at random by a card draw. The home is another breed of cat.
Many older people choose to sell the home while they are alive.
Another alternative is to have the executor be required to sell the home. Leaving only cash or securities makes for happier heirs and less complex and costly estate administration. For the first time this year I was faced with bills that I could not collect. I want to take a bad debt deduction on my tax return, but the accountant said I couldn't do it. We got into a pretty hot discussion over this, and he suggested I look into it further before we meet again.