Firstly, there is definitely a huge market for stone hand casts and memorial jewellery out there! I have had experience with another business in a similar market and with the power of social media and email marketing, they have really been able to grow their business.
I think this would be extremely beneficial for your business to continue to grow and gain more potential customers. My suggestion, Facebook and Instagram Advertising. You stated that you have a number of photos of the products which is extremely helpful for this. Facebook and Instagram Advertising is budget-friendly and we have the ability to really narrow down and be specific as to who you want to target.
I’ve attached a link informing you of the benefits of Facebook Advertising https://www.lyfemarketing.com/blog/facebook-advertising-benefits/
As you said, you want to be using more Social Media. Again, the fact that you have numerous images is extremely helpful and can attract numerous customers. Influencers are also great who have a large following. They are able to speak about your brand and show your products, which will gain you more followers and potential customers. I really believe that with your business, there is huge potential using Social Media and Facebook Advertising to grow your business.
Where I could potentially help, I run E-Commerce businesses online and specialise in helping with Advertising and Social Media for businesses. I also can help with website design and having cohesive platforms across your Social Media and Website. As said, I have experience with a similar business in the same market so know which audiences would be interested in your products and how to market this.
Any questions, please don’t hesitate to contact me: firstname.lastname@example.org