The gemstone opal is most commonly associated with autumn, frequently appearing as the solution to crossword clues referencing a fall or autumn birthstone. While several gemstones are linked to the autumn season – topaz, garnet, and even diamond are mentioned – opal consistently emerges as the primary answer in crossword puzzles and general references. This article will explore the identification of opal as an autumn birthstone, its characteristics as presented in available sources, and its historical and cultural connections as revealed within the provided materials.
Historical Recognition and Crossword Clues
The consistent appearance of “opal” as the answer to “autumn birthstone” in crossword puzzles, spanning publications like The Wall Street Journal, USA Today, and The New York Times, demonstrates its strong association with the season. Sources indicate this connection has been recognized as recently as May 30, 2025, and as far back as July 22, 2019. This repeated association suggests a cultural understanding, even if not formally codified in all birthstone lists. The sources primarily focus on its role as a solution to crossword puzzles, highlighting its recognition as a four-letter word fitting the description of an autumn birthstone.
Gemological Characteristics
The provided sources offer a basic description of opal as a “translucent mineral consisting of hydrated silica of variable color.” It is described as a “precious stone” known for its “rainbow-like play of color.” Further characteristics include being “opaque,” “iridescent,” “milky-white,” and sometimes referred to as a “fiery gemstone.” It is also identified as a gemstone from Australia and an “Aussie gem,” suggesting a significant source of this material is located there. The sources also mention it as a stone often found in rings and pendants.
The sources do not provide a chemical formula, refractive index, or hardness rating for opal. However, they do categorize it as a gemstone used in jewelry, implying a degree of durability suitable for wear. The description of opal as “hydrated silica” indicates its composition includes water, which may influence its care and maintenance.
Opal in Lore and Symbolism
While the sources are limited in detailing the lore surrounding opal, they do offer some insight. Opal is described as a stone for many Libras, linking it to astrological signs. The term “fiery gemstone” suggests a connection to passion or energy. The description of opal as “colorful” and possessing a “rainbow-like play of color” implies a symbolism of vibrancy, change, and perhaps illusion. The sources also mention it as a stone associated with innocence and purity, though this association is linked to the month of April and a diamond, rather than opal itself.
The references to “opal fire” and “harlequin” suggest a historical and cultural fascination with the stone’s unique optical properties. The description of the Olympic Australis as the largest opal in the world hints at the value placed on exceptional specimens.
Sources and Mining Locations
Australia is explicitly identified as a significant source of opal. The sources do not detail other mining locations or geological formations. The mention of the Olympic Australis, the largest opal, reinforces Australia’s prominence in opal production.
Crossword Context and Related Terms
The sources reveal a pattern of crossword clues related to opal. Beyond “autumn birthstone,” clues include “opaque gem,” “iridescent jewel,” “stone that shimmers,” “pendant stone,” “milky-white gemstone,” and “colorful gem.” These clues demonstrate the diverse characteristics used to identify and describe opal. The inclusion of clues like “fall mo.” (OCT) and “fall chore” (RAKE) alongside opal-related clues in the same crossword puzzles suggests a thematic connection between the gemstone and the autumn season.
Table of Opal Characteristics (Based on Sources)
| Characteristic | Description |
|---|---|
| Composition | Hydrated Silica |
| Color | Variable, Rainbow-like Play of Color |
| Transparency | Translucent, Opaque |
| Appearance | Iridescent, Fiery, Milky-White |
| Origin | Australia (Significant Source) |
| Use | Jewelry (Rings, Pendants) |
| Symbolism | Colorful, Vibrant, Associated with Libras |
Conclusion
Based on the provided sources, opal is strongly identified as an autumn birthstone, primarily through its frequent appearance as the answer to related crossword clues. It is described as a hydrated silica gemstone known for its unique play of color and iridescent qualities. Australia is highlighted as a key source for this gemstone. While the sources offer limited detail regarding its historical lore or comprehensive gemological properties, they establish opal’s cultural association with the autumn season and its recognition as a valued gemstone. The available information, though limited, paints a picture of opal as a vibrant and captivating gem with a strong connection to the fall months.