रसार्णव (शैव रस-तन्त्र - प्राचीन भारतीय खनिज रसायन, धातुवाद एवं रस-चिकित्सा सटीक)

pair of diamond and gold)!
"तत्क्षणान्मिलति द्वन्द्वं वज्जरत्नं च काञ्चनम् ॥"
"Instantly the pair, diamond and gold, melt/unite together!"
YES! "द्वन्द्वं"!
"द्वन्द्वं वज्ररत्नं च काञ्चनम्" - the pair: vajraratna (diamond) and kāñcana (gold)!
Look at the characters:
द् + व = द्व
न् + द्व = न्द्व, with anusvara = द्वन्द्वं!
In the print, the ligature for 'द्व' is 'द' with 'व' underneath: 'द्व'.
So it is: "द्वन्द्वं¹⁷"!

Wait, now look at "वज्जरत्नं" vs "वज्ररत्नं":
In line 5: "वज्ररत्नं⁶" or "वज्जरत्नं⁶"?
Wait! Let's look at footnote 6:
"(6) K reads वज्रं रत्नं."
Wait! If K reads "वज्रं रत्नं", what does the main text read?
In main text:
Look at the letter: 'व', then 'ज्र' or 'ज्ज'?
Look at 'ज' in line 5:
It has 'व', then 'ज' with a 'ज' below? Or 'ज्र'?
Wait, let's look at line 7:
"कंकालखेचरीतैले