Hi there,I hope everyone is well.Could someone please confirm that this vase is by frantisek Vizner.If so does it have a generic name.For example waisted vase or lens vase.Also what is the correct colour description.Lilac or Amethyst.The dimensions are approx 21cm high, 10cm wide at widest point,7cm at narrowest point and the top lip is about 1.5cm thick.The weight is approx 1354 grammes.Do these vases come in different sizes and shapes. Are these vases more common than the lens and waisted vases.Thanks in advance.