I would not recognize it as a pentacle.
Alternates ?? https://www.etsy.com/listing/561250879/diamond-pentacle-in-heavy-solid-gold?ga_order=price_desc&ga_search_type=all&ga_view_type=gallery&ga_search_query=pentacle+necklace&ref=sr_gallery-1-1&frs=1&organic_search_click=1
https://www.etsy.com/listing/1295794011/rare-stunning-vintage-circa-1980s?ga_order=price_desc&ga_search_type=all&ga_view_type=gallery&ga_search_query=pentacle+necklace&ref=sr_gallery-1-11&sts=1&organic_search_click=1
https://www.amazon.com/BLINGZ-Pentagram-Medallion-Pendant-Necklace/dp/B08KKD41JZ/ref=sr\_1\_12?crid=1G7IUA8JF8PQN&keywords=pentacle%2Bnecklace&qid=1681197620&sprefix=pentacle%2B%2Caps%2C106&sr=8-12&th=1