(9.5.11) Which are Panch Ratna / Panch ratna in Hinduism

Panch Ratna kaunase hain ? Panch Ratna kya hain ? Panch Ratna / What are Panch Ratna पंचरत्न कौनसे हैं ?
Names of Panchratna - The following are the names of Panchratna 
1. Sonaa (सोना)
2. Heeraa (हीरा )
3. Neelmani (नीलमणि )
4. Padmaraag (पद्मराग )
5. Moti (मोती )
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(9) Knowledge 
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(9.5.1) Saptrishis / Seven Sages
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(9.5.2) Five elements / Panch Tatva
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(9.5.3) What are four Vedas
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(9.5.4) What are Upved in Hinduism 
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(9.5.5) What are the weapons of the Hindu gods
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(9.5.6) What are the names of Saptrishis 
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(9.5.7) Names of eighteen Purans
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(9.5.8) What is Ashta gandh 
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(9.5.9) What are Ashta Mahaa Daan
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(9.5.10) Who are the seven Chiranjivi (Sapt Chirjivi Stuti)
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(10.5.13) Vinayak Chaturthi Vrat dates / Siddhi Vinayak Chaturthi

When is Vinayak Chaturthi in 2017-2018 / Vinayak Chaturthi dates 2017 -2018/Siddhi Vinayak chaturthi 2017-2018 dates

Which Chaturthi is known as Vinayak Chaturthi -
The Chaturthi which falls in the Shukla Paksh of the Hindu month is known as Vinayak Chaturthi or Siddhi Vinayak Chaturthi.
In the year 2017 - 2018 the Vinayak Chaturti Vrat dates are as follows -
Vinayak Chatrthi Vrat dates in 2017
Hindu month ------ Date
> Paush---------------02.01.2017
> Magh---------------31.01.2017
> Phalgun------------02.03.2017
> Chaitra------------31.03.2017
> Vaisakh ----------29.04.2017
> Jyeshth------------28.05.2017
> Aashadh-----------27.06.2017
> Shravan-----------26.07.2017
> Bhadrapad--------25.08.2017
> Ashvin-------------23.09.2017
> Kartik-------------23.10.2017
> Margshirsh-------22.11.2017
> Paush -------------22.12.2017
Vinayak Chaturthi Vrat dates in 2018
Hindu month ------ Date
> Magh--------------21.01.2018
> Phalgun-----------19.02.2018
May Lord Ganesh bless you with prosperity, happiness and health!
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(10.5.1) The list of  Hindu Festivals / Vrat etc.in the current year