Lightning Rod Balls: Colorful Glass Orbs from America's Rooftops
Lightning rod balls are the decorative glass globes that were mounted on lightning rod systems atop American buildings from the 1850s through the 1930s. Originally marketed with the folk belief that the ball would shatter if the rod was struck by lightning (thereby providing visual proof of protection), these glass orbs were produced in a dazzling array of colors, sizes, and surface patterns. Today, lightning rod ball collecting is an active and well-organized hobby with thousands of enthusiasts pursuing rare colors, patterns, and manufacturers.
Identification
Lightning rod balls are identified by color, shape, surface pattern, and manufacturer. Key identification features:
- Colors: Range from common white milk glass and opaque blue to rare red, amber, gold mercury, green, purple, and multicolored swirl
- Shapes: Round (most common), egg-shaped, flat-sided "doorknob" style, and less common ribbed or faceted forms
- Surface patterns: Plain, ribbed, quilted (diamond pattern), swirl, moon-and-star embossed, and grape pattern
- Sizes: Standard sizes range from approximately 3.5 to 5.5 inches in diameter
- Manufacturers: Hawkeye, Diddie & Marshall, National, Barnett, and many unidentified makers
The standard reference is the numbering system developed by collectors that classifies balls by shape and pattern, with cross-references to known manufacturers.
Types and Rarity
- Common: White milk glass, plain round, opaque light blue
- Moderately scarce: Cobalt blue, amber, clear, green
- Scarce: Red, yellow, gold mercury glass, purple
- Rare: Multicolored swirls, flashed colors, unusual patterns
- Extremely rare: Certain color/pattern/size combinations; documented one-of-a-kind examples
Auction Price Ranges
| Category | Price Range |
|---|---|
| Rare red or red swirl | $500 - $3,000+ |
| Gold mercury glass | $200 - $1,000 |
| Cobalt blue (quilted or ribbed) | $75 - $400 |
| Amber and yellow | $100 - $500 |
| Green (various shades) | $50 - $300 |
| Purple/amethyst | $75 - $400 |
| White milk glass (common shapes) | $10 - $40 |
| Opaque blue (common) | $15 - $50 |
| Multicolored swirls | $300 - $2,000+ |
Condition Factors
Lightning rod balls spent decades exposed to weather on rooftops, so surface wear and minor imperfections are expected. Common condition issues include:
- Chips: Small rim chips where the ball meets the rod cap are common and tolerated; large chips significantly reduce value
- Cracks: Hairline cracks from thermal stress or impact; check by tapping (a cracked ball produces a dull sound)
- Weathering: Sun-faded colors, surface etching, and mineral deposits from rain
- Cap damage: The metal collar where the ball mounts on the rod; original caps with good condition add value
Balls retaining strong, vibrant color and smooth surfaces are at a premium. Interior residue (dust, insect nests) is expected and easily cleaned.
Collecting Tips
Color is the primary value driver in lightning rod ball collecting. A common shape in a rare color can be worth 50-100 times the value of the same shape in white. The Lightning Rod Ball Collectors Club is active and hosts annual shows that are the best venues for buying, selling, and learning. Window displays and shelf arrangements that allow light to pass through the glass showcase the colors beautifully. Many collectors combine lightning rod balls with complete rod systems, weathervanes, and related rooftop ornaments. Balls are still occasionally found at farm auctions, estate sales, and during barn demolitions. When purchasing, examine carefully for hairline cracks by holding up to strong light and tapping gently. Published price guides and the collector club newsletter provide current market data. Reproductions are uncommon but exist; study the glass quality, seam lines, and surface character of authenticated examples.