A poster called Lambelle wrote the following on 24 March based on the article, which is based on inventories in Queen Ena's own hand:
"He mentions a piece by Ansorena that brings me down the street of bitterness: diadem of diamonds and sapphires mounted in platinum, with a large cabochon sapphire in the centre and several more adorning the piece. It was already in Ansorena's article, but not her description. What would become of her?"
Queen Ena clearly had a cabochon sapphire tiara, her mother received a cabochon sapphire tiara as a wedding gift. Coincidence? Maybe but the description sounds very similar to the image on Ursula's website, although it appears Ena's piece was an Ansorena piece, that doesnt mean she didn't have it changed by Ansorena.
All just speculation of course.