Blue Mason Jars do not 'turn' blue, they are manufactured from a greenish/bluish glass.
This glass contains trace amounts of Iron and/or Cobalt ... the greater the concentration, the deeper the color.
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Blue mason jars with iron crosses are worth more than regular mason jars. Online venders sell them for between 8 and 25 dollars, depending upon the condition of the jar.
The numbers found on Lamb Mason jars, and all Mason jars, are mold numbers. The numbers 3,9,13, and 18 would be the number of the mold the jars were made from. The jar originally started out as clear but as it aged it would turn pink.
They are available in some antique stores and junk shops.
Please give me the value of 4 blue ball mason jars that I have. The numbers on the bottom are: 0, 4, 6, 7
Generally, old jars and bottles using blue colours signified poisons and medicines. So I would say they are not food safe - just to be safe.
You can go to an antique dealer or call them and describe your jars. They should be able to give you the going rate.
Blue Perfect Mason canning jars with the number 2 marked on the bottom are typically valued between $10 to $20, depending on the condition and rarity of the jar. Collectors often pay a premium for jars in good condition with clear glass and minimal defects.
Yes, the microwave safe symbol is typically present on mason jars.
The Mom's Mason jars were made in 1975. They were manufactured in Columbus, Ohio and are worth between $1.00 and $2.00.
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The most valuable blue-tinted mason jars are typically those produced by Ball, Kerr, and Atlas, particularly from the late 19th to early 20th century. Jars in the "Ball Perfect Mason" series and those with unique features, such as rare sizes or embossing, tend to fetch higher prices among collectors. The value can also increase based on condition, rarity, and historical significance. Antique jars in pristine condition can sell for hundreds to thousands of dollars at auctions or collector shows.