Los Castillo fused the layers,your pieces appear to be soldered. So it is possible they are design copies and not made by Los Castillo.
It depends on the setting the stone is mounted in,this gauge helps in some cases. https://www.esslinger.com/gemoro-suregauge-xl-digital-gauge/
https://diamondsizecharts.com/princess-cut-diamond-size-chart/
From what I can see in the photo the construction of the bracelet was not simple.I have been wearing a sterling and copper bracelet for thirty...
Yes,many in Texas.
The "bubbles"are from wax pattern casting,they didn't apply a debubblizer to the pattern before pouring the investment.
Carnelian can also be banded. [ATTACH]
It looks like carnelian.
Grieger's,Rio Grande and other suppliers have sold that script Sterling mark stamp probably since before the 1970's.
Fraternal Order of Eagles
What looks like bubbles to me.... [ATTACH]
Maybe it's the lighting in the photo,etc.To me it looks like resin bubbles in the circled areas. [ATTACH]
#1 has many air bubbles visible.
Probably not made in the USA and has sloppy soldering a student/hobbyist would leave on a piece.
Looks like it might be an ammolite doublet/triplet,but whoever glued it together did a poor job of it.
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