This is an online t-shirt company that sells to female consumers.
Ideas & concepts
I was thinking there should be a diamond in the logo. Like in the EMPIRE example below. A diamond at the top. The next line would be Black Diamond. There would be a thick line under "Black Diamond" then the next text under the line would be T-Shirt Company. The letters can be in upper case or lower case whichever you think looks better. I was thinking it could be a black and white log with maybe a pop of hot pink somewhere in the logo but mostly black and white. Or if you think black and white is best. I'm open. I'll be using a simple black/white website. White background on website with black letters. It's the Shopify "Simple" free template. I love the color schemes in all of the attached logos.