Well this is interesting. I have been fighting turbidity for almost 3 years and had never noticed many of these things such as color of the turbidity in the beam, etc.
Of course I look closely at the color of the colloidal silver in different lighting conditions but when it comes to the turbidity the only thing I have ever looked for is the total amount of "fog in the headlights". I have a few strong focused beam flashlights but I think they are all aprox the same color of white.
Expanding on what Kephra mentioned about the 3 causes of turbidity, here are possible causes for each one of those:
A) Silver oxide particles which have precipitated.
1. Too high of a current for the anode size and amount of stirring.
2. Voltage across electrodes too low.
3. Not enough electrolyte so pH too low for the type of reducer you are using to work properly.
4. Doing the electrolysis at too low of a temp (like under 70* F)
5. Running electrolysis for too long so your IS gets above 20 PPM at room temp.
6.
B) Silver metal dust which was swept from the cathode
1. Not enough electrolyte to prevent silver from gathering at the cathode.
2.
C) Foreign material from the reagents.
1. Unclean glassware, anode or cathode.
2. Contamination in DW or in Electrolyte solution.
3. "Other stuff" that might be in something like Cinnamon Extract, etc.
4.
D) Less than optimal procedure for the type of reducer you are using.
(I have found that each different reducer has it's own favorite pH and temp for the reduction to produce it's best possible color & clarity. Please note: YMMV)
1. Cinnamon Extract: if you do the reduction at room temp = slightly more turbid.
2. Cinn Ext: if you get the IS up to boiling on hot plate and then add the Cinn Ext it will be dark & turbid. (optimal I have found for Cinn Ext = get IS to about 180*F then add Cinn ext one drop at a time on stirrer.)
3. Karo, Dextrose or Fructose: if you get the IS up at high temp and then add the reducer it will be slightly more turbid. (optimal I have found is to reduce right after electrolysis with no added heat so in the upper 70*'s.)
4.
I took the liberty of adding a fourth category (D). As I mentioned YMMV and some things in that category may be closer to opinions rather than facts? Many things are dependent on numerous variables.
Hopefully Kephra could fill in the blanks with things I haven't thought of and correct any incorrect statements.
@ Sancho: I take it then that your Agave bottle is in the pantry & your Karo bottle is sitting next to your stirrer