Shilajit and Swarna Bhasma (Gold Calx) - Both are anti aging medicines. How they are compared to each other, in terms of qualities?
Answer by Dr JV Hebbar
Before I start this, if you want me to compare any two medicines or herbs, reply to this email. I will consider the best ones and write about them.

Swarna Bhasma
Gold is subjected to a variety of processes, heating and dipping in various decoctions, incineration etc. to end up in its final format - Swarna Bhasma. It is called Calx of gold. 
Qualities of Swarna Bhasma 
आयुर्लक्ष्मी प्रभा धी स्मृतिकरं अखिलव्याधिविधंसि पुण्यं भूतावेश प्रशान्ति स्मरभरसुखदं सौख्यपुष्टि प्रकाशि। रसरत्नसमुच्च्य 5/9 
मृतं सुवर्णं मधुरञ्च वृष्यं हृद्यं च नेत्र्यं परमञ्च मेध्यम् । 
रसायनं पुंसवनोपयोगि विषापहं कान्तिकरञ्च शस्तम् ॥  रसतरङ्गिणी 15/69 
āyurlakṣmī prabhā dhī smṛtikaraṃ akhilavyādhividhaṃsi puṇyaṃ bhūtāveśa praśānti smarabharasukhadaṃ saukhyapuṣṭi prakāśi| 
rasaratnasamuccya 5/9 
mṛtaṃ suvarṇaṃ madhurañca vṛṣyaṃ hṛdyaṃ ca netryaṃ paramañca medhyam | 
rasāyanaṃ puṃsavanopayogi viṣāpahaṃ kāntikarañca śastam ||  rasataraṅgiṇī 15/69 
Swarna Bhasma 
āyurklaram - promotes life expectancy, anti aging
lakṣmīkaram - brings  good fortune
prabhākaram - brings glow to the skin and aura to your personality 
dhīkaram - improves intelligence
smṛtikaraṃ - improves memory
akhila vyādhi vidhaṃsi - can be used in all disorders 
puṇyaṃ - auspicious,
bhūtāveśa praśānti - useful in psychiatric disorders, hence used in many such medicines as Saraswatarishtam, Manasamitra vatakam etc.
smarabharasukhadaṃ - acts as an aphrodisiac
saukhya - brings comfort to the mind   
puṣṭi prakāśi - improves nourishment of the body tissues and cells and makes them last longer.
Read more about Swarna Bhasma ingredients, side effects, dose etc.

Shilajit qualities |
शिलाह्वं कटुतिक्तोष्णं कटुपाकं रसायनम् | छेदि योगवहं कैयदेवनिघण्टु - २. धातुवर्ग ​
śilāhvaṃ kaṭutiktoṣṇaṃ kaṭupākaṃ rasāyanam |
chedi yogavahaṃ | kaiyadevanighaṇṭu dhātuvarga
kaṭu - pungent, spicy
tikta - bitter
uṣṇaṃ - hot
kaṭu pākaṃ - undergoes pungent transformation in the body
rasāyanam - Rasayana 
chedi - breaks down toxins, cholesterol deposits, plaques, opens up body channels
yogavahaṃ - acts as a catalyst

Swarna is sweet, coolant, improves nutrition, soothing, cooling,  directly nourishes and rejuvenates body tissues 
Shilajit is hot, spicy, pungent and breaks open the blockages. 
Both have rejuvenation, anti aging and aphrodisiac properties. 
Read more about Shilajit uses, dose, qualities, benefits

A16Z is one of the powerful venture capital firm in the world. Ben Horowitz is a cofounder of this incredible firm. Ben, in his business book - Hard things about hard things, explains about two types of CEOs. 
Wartime CEOs and Peacetime CEOs 
Steve Jobs was a wartime CEO. He goes to war, breaks the preconceived notion and establishes his own line of products. He was hot. 
Tim Cook is a peacetime CEO. He brings method to madness. He holds the ship together and sails it in the right direction. He is calm, cool, composed.

Shilajit is a wartime anti-aging remedy, probably more useful in a disease situation, to heal and repair tissues very quickly, break open the closed channels etc. 
Swarna Bhasma is a peacetime anti-aging remedy - soothing, calming, nourishing, enriching etc. 
To sum it up, Shilajit is hot, Swarna is cool :)  

Wish you good health :) 
Dr JV Hebbar