Wow table etc. and is for all the time, or holidays? What colors do you use, and what finish is chandelier?
searched centerpiece and as usual! lots of ideas:

Something in threes:

Thanks @everdebz. The space is all neutral palette, so I have some room for color. Chandelier is venetian/gold leaf.

So what do you thing about Judy's photo introducing a color? I asked cause I wondered what your plates are.
Like Maureen's gleam!

Love your dining room and furniture.
Something like this?

Something modern like straight sided round glass vases with moss, beach rocks, driftwood nuggets. And I mean a row of three or five, with or without candles. It would tie in with your beautiful natural table.

zgallerie has nice decorative items:
http://www.zgallerie.com/p-15668-axton-round-bowl.aspx
http://www.zgallerie.com/p-14234-massima-bowl.aspx

Or...

First of all, I think with your rustic look, which I love btw, I would go with a different hanging light fixture. Carolins picture has a nice one and I am including a few below.

Along with that, keep your centerpiece low so that the main focus is on the light. I am including some pictures to give you an idea of what I mean.







https://www.houzz.com/discussions/love-this-rustic-chandelier-but-have-a-few-questions-dsvw-vd~953935

.

Something like this would look really good also. It actually measures 42 inches long! So it would look great on such a large table. We could put succulents in it for a modern/minimalistic look or use more traditional flowers like orchids for something more striking. The pot comes in several colors too. Contact us at thepetalhouse@gmail.com or 606-312-5891 for details.