Let's debunk the myth of actual longevity of these shiny wonders that are known to transform lives, Gemstones. Gemstones have been vastly revered not only for their exquisite appearance but also for their alleged mystical properties accompanied amidst it. Lets delve deeper into this utmost intriguing topic and sieve facts from fiction.  

The natural formation of gemstone takes a minimum of million years before you can accessorise it. From a vast realm of gemstones each gemstone acquires its own composition. If we were to go by empirical evidence, then it states that a gemstone may even outlive the average human mortality rate i.e. 85 years. This might not be the most right form of stating the fact as of in this context. But it can be put into words as; the tenure of maximum effectiveness for attracting planetary influences.

According to mythologies, it was believed that the weight of the gemstone was directly proportional to its effectiveness. It was then countered by another belief set that the effectiveness of the gemstone is also determined by the amount of strength required by a specific celestial object.

However, elderly scholars swifted with the belief that following gemstones have effectiveness as follows: 

• Diamond - 10 years
• Ruby/Manik - 12 years 
• Yellow Sapphire/Pukhraj - 15 years 
• Blue Sapphire/ Neelam - 15 years 
• Emerald/ Panna - 12 years 
• Coral, Hessonite Garnet and Cats Eye - 3-5 years 
• Natural Pearl - 12 years 

Concluding that gemstones do not possess any sort of expiry date in conventional sense only however, their beauty can be passed down through generations while extraneous influences may affect their appearance but would never kind of demolish them. 

So, the next time you admire a bling emitting out of these gemstones, do not forget that this rarity has transcended times, reminding us of nature's one of the most majestical superpowers.