Thanks demifloyd & Decor Diva. I will try to post some pics on the kitchen forum. Decor Diva, you asked about the mantle & columns, they are Cantera Stone. Here is a description of Cantera: "Cantera Stone Cantera is a natural igneous stone, formed as a result of the intense heat and pressure associated with volcanic activity. Porous and lightweight, cantera stone is a preferred construction materials throughout the ages, for its natural beauty, exquisite color varieties, texture and durability. Many ancient buildings and monuments in Mexico, made of cantera stone, have stood the test of time for thousands of years. The unique composition of these stones make them ideal for carving. They are strong and durable yet relatively light weight. A porous stone, Cantera's molecular structure allows it to absorb air and humidity without causing the stone to change shape, an indispensable quality for construction materials." One more picture shows some of the stone with cantera:

Your fireplace looks great by itself. But I would keep the pictures on the mantle anyway. The only thing I would change is the frames and mats. Black frames are stealing attention from the pictures. Try choosing more neutral colors both for frames and mats. I think white and grey will match perfectly.

Pretty mantelpiece. I would not use those arched pieces though. They're too busy and don't convey anything of your own personal style. I would instead hang nicely, but simply, framed artwork on both sides; pieces that are large enough to have an impact and definitely artwork that means something to you. Could be photographs, paintings, prints -- whatever you gravitate towards ... but those faux "architectural" pieces really fight with your clean, lovely lines.

As to colors: poppy floral art and rug - both have orangey- red? you could zing with 3rd orange [glass bowl type thing]. Or just keep the blues, brown sofa, etc., and have enough going. if this didn't work? can wear it... their display photo, see dark / grey chair with it. https://www.etsy.com/listing/940959810/100-luxurious-soft-silk-vibrant-green?ga_order=most_relevant&ga_search_type=all&ga_view_type=gallery&ga_search_query=peacock+blue&ref=sr_gallery-1-4&bes=1