Ok.. I'll try my best using my old photo archives to put this piece together... thanks for the request me for this...
Heterometrus spinifer takes 2 years to reach maturity. They molt up to 7 times... bringing to 8th instar when they mature.
At 1st instar, the white young (as in most scorpions) are glutinously soft, fragile, and lacking any exoskeletal definition.
At 2nd instar (the 1st molt) the young attain the anatomical resemblance of their parents but still retain the ghostly white coloration.
3rd instar: the young darken in color to a purplish/brownish hue; still far from the dark, iridescent aqua-green of most adults.
At this stage however they still benefit from the being under the care of their mother as seen in this pic of one of my females actively feeding her young.
The mother will dispatch large prey items for them and allow them to mob feed around the carcass.
4th-5th instar; these juveniles start to show their dark colors... Even now, its is sensible to keep them communally since they do cooperate sometimes to bring down larger prey.
Separation from the mother is not absolutely necessary as in the wild, I've seen colonies of 4th to 5th instars still living with their ginormous mom; which suggest maternal care for both species may be longer than previously believed.
Up to this point Heterometrus spinifer can be sometimes mistaken for H. longimanus. This is due to the shape of the chela being relatively slender in comparison to adults. Granulations on prosoma (carapace) may sometimes be misconstruing to ascertain the accurate species ID.
6th-7th instar is the stage most of them will naturally disperse away from mom and form packs consisting of 5 to 8 individuals. Sometimes in the wild, the mother will leave the burrow to find a new place while the sub-adults form a sub-social colony in the same undergrowth they were born.
on the 7th molt... they reach the mature 8th instar phase....
this is evidently indicated by the fully-bloomed chela of this freshly-molted individual, which is more bulbous than in juveniles.
The final hardening of the exoskeleton in maturity reveals the characteristic blackish-seagreen sheen and a distinctively orange/red colored telson which was a creamy white in juveniles and sub-adults.
I hope this helps... I'm compiling all this for part of a paper I'm working on the natural history of H. spinifer and longimanus... so this is a rough draft of the life cycle bit.