Heisey Collectors of America – Frequently Asked Questions

Do you have questions about Heisey Glass or the Museum?

E-mail your question to the Museum at curator@HeiseyMuseum.org and we will try to answer it.

Q. How is glass made?

A. Glass is made by combining silica (sand or quartz) with an alkali such as soda or potash, and heated the mixture until it is molten.  In the molten state glass is easily manipulated by blowing it or pressing it into a mold.  It can also be reheated in various stages to allow additional reshaping. Glass making was America’s first industry, and began in Jamestown VA.

Q. How long did the A.H. Heisey Company make glass?

A. In 1896, Augustus H. Heisey opened his glass factory in Newark Ohio with about 250 employees. It produced world-famous elegant glass tableware for 61 years, and closed in 1957.

Q. Is Heisey glass still being produced?

A. A.H. Heisey & Co. closed in 1957, so Heisey glass is no longer produced. However, HCA owns many of the original Heisey molds and reproduces select items for fundraising purposes. To distinquish these reproductions from the originals, a piece is not made in the same color(s) in which Heisey made it and is marked with “HCA,” the year of reproduction, and a letter or symbol representing the glass company that reproduced it.

Q. Tell me about the Diamond H Trademark.

A. In 1901, Heisey began marking their glass with an H within a diamond shape.  (can we show an example of the real trademark here?) This would become known as the Diamond H trademark.  According to a trade journal of the time, “This trademark is your guarantee that the ware is the best to be obtained.”  In later years, instead of pressing the trademark into the glass, Heisey used paper labels on their glass.

Q. Are all pieces of Heisey marked/signed?

A. Yes and no! After 1901, when the finished product left the factory, all pieces were marked. Some pieces had the famous “Diamond H” molded into the glass, while others had only a paper label identifying them as Heisey. Blown pieces only had the paper label. Molded pieces were all to be marked with the Diamond H in the glass, but wear on the molds sometimes prevented a clear mark, and the mark could also be polished off when the glass went back into the glory hole for the final fire polishing. Just because you can’t find the mark, don’t let a good piece of Heisey slip through your hands! A little studying will go a long way to help you identify that unmarked piece of Heisey.

Q. Where is the Diamond H found on the glass?

A. Sometimes the Diamond H is found on the bottom or middle of the item, but not always. Heisey often placed the Diamond H in unnoticeable places. Stemware is a prime example.  Look for the Diamond H at the top of the stem, or hidden within the pressed design.

Q. How many colors of glass did Heisey make?

A. Heisey made the following 16 production colors: In 1897 the first colors were: Emerald, a vibrant dark green color; Ivorina Verde, a creamy custard color; and Canary, now called vaseline. Other colors soon followed:  Opal (1989), a milky white translucent color; Flamingo (1925), a pink color; Moongleam (1925), a medium green; Hawthorne (1927), a pale lavender; Marigold (1929), an intense yellow gold;  Sahara (1930), a pale yellow; Tangerine (1932), a bright red-orange; Stiegel Blue (1932) a deep cobalt; Zircon (1937), a blue-green aqua; Sultana (1952), a deep rich amber; Dawn (1954), a charcoal grey; Limelight (1955), a reintroduction of Zircon.

Q. How can I learn more about Heisey Glass?

A. Join HCA – receive the Heisey News, the monthly newsletter and enjoy free admission to the  Museum – Membership Application Form

Join a Heisey Study Club – meet fellow collectors and HCA members and learn more about your  favorite glassware – Study Club Contact Information

Visit the Museum – and see glass that was made throughout the factory years – Purchase one of many reference book about Heisey Glass on Ebay