Vintage 10k Black Hills Green stone retail Ivy ring stamped

Product Name: Vintage 10k Black Hills Green stone retail Ivy ring stamped
A Stunning ring!!! The ring is solid 10k gold all yellow gold w/rose gold on one leaf There a leafs next to the marquise cut Green stone it glows almost in the right light With a Ivy vine of gold wrapping up the stone if The maker is Coleman Black Hills I found others the listings R not consent on what the green stone is ? And I'm unsure what it is myself I've seen some say Lab created emerald/emerald another say Helenite so to be safe I'm listening as synthetic/unsure on the stone But the ring is stamped CCO 10k in the band but whatever the stone is it's gorgeous This one weighs a little more then most I've seen as it's a Size 9.25 ring the weight is 2.49 grams so of course more gold higher cost I am pricing this one competitively 4 size I will even add a couple others in pics there's were smaller sizes then mine The ring is in good-very good vintage pre retail owned condition only the very slightest signs of any ware/age Review all pictures 4 details/condition/size ?s ask thanks.