Ancient Glass Blog of The Allaire Collection


Posted in Uncategorized by Allaire Collection of Glass on November 16, 2017


Dimensions: H = 13,1 cm.; ø bowl 6,8 cm.; ø foot 7,1 cm.’ weight 66 grams.  Origin: Tuscany ~ mid 17th century

Description: The round funnel bowl has 12 ribs formed with the mezza stampaura technique, or the double dip method. In the English nomenclature these ribs are called gadroons. Just above the gadroons the bowl is further decorated with a single thin thread of glass. The bowl is set on a hollow stem embellished with two somewhat annular hollow knobs. Subsequently the stem is set via a kind of “sock” on the slightly conical folded foot. For this type of stem the descriptive term “spool form” was developed. . (See the stem formation chapter on this site).

Remarks:There is a distinctive difference between cristallo and vitrum blanchum (VB). For example, cristallo has much less CaO than VB say ~ 5% vs. 10%. The Na2O% is also different say ~ 17% vs. 13% and for SiO2 ~ 70% and ~ 65% and that can vary by origin. See as example, the Annales of the 20th AIHV congress in 2015, pg. 552, Hulst eo. “The golden age of Amsterdam glass.

Tim Osborne stated in his catalogue of the Tim Udall collection that gadrooning was derived from a continental practice. See the picture of the jelly glass from the Tim Udall collection, now in our collection glass # 109 , which has the same type of decoration. From the input of Peter Korf de Gidts and Kitty Laméris we learned that this type of decoration is typical for glasses from Tuscany. (see the references under parallels)


  • Dexel: Gebrauchsglas pg. 41 fig. 9a,
  • Laghi, Fragili Trasparenze, vetri antichi in Toscana, nr. 13 pag. XIX, Biccheri Firenze, coll.privata. See also pictures 3 and 4 for the typical stem construction.
  • Ciappi, Laghi eo. “Il vetro in Toscana, Strutture Prodotti Immagini (sec. XIII-XX) pg.69, see also pg. 94 fig. 148,
  • See also Lanmon, The Golden age of English glass pg. 82,
  • See glass # 122E from the Allaire collection which is an almost identical glass.



  • “with” Derek Davis, June 1978,
  • the Henry J. Mein collection,
  • Bonhams New Bondstreet, auction nr. 22605, nr. 69, 12-11-2014.


Jelly glass

H = 6,3 cm.; ø 6,3 cm.; ø foot 3,8 cm.; weight 69,5 grams,

Origin: England end 17th century.

Provenance: – ex Tim Udall collection,- Delomosne 2012,

Parallels: 42E English lead-glass Jelly Allaire Collection

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