One must consider the grade. High grading seed pearls to create strands obscures their origin, because data needed to make a proper analysis is missing. Human intervention, intentionally or not, give subjective impressions to appear in ways the market, not science perceives them.
Again, pearls can be any color, any size and any shape for any reason irrespective of species .
Antique natural pearls is my main area of interest, and after reading this thread I've been trying to analyse my approach to identification.
I really wish all of you could see my collection in person. It would change the way you view pearls.
In the 40 years of doing this, I've harvested more than 10000 natural pearls. To the average Joe, one might think I'd arrive at a showing with a few sacks over my shoulders or toting Mikeyy's giant suitcase. When in fact, I'll show up with a couple of film containers and a hundred or so 1x2 plastic ziplock bags in a small tupperware sandwich box.
Just the action of pouring them out, grabs attention you wouldn't otherwise expect. All pearls appear differently in various lighting, but culture pearls vary to a lesser degree than naturals. Natural pearls look horrid in balanced light, yet extreme light and sharp angles raise naturals to extraordinary heights not possible in cultural pearls. This is when flame patterns, translucency or other features stand out.
All kidding aside, I'm delighted that she's delighted and needless to say, am anxious to see how they look with her new seed strand.. hint hint.
Natural vs Cultural
Luster ----------- 0.0 - 0.0
Shape ----------- 0.0 - 0.0
Inclusions ------ 0.0 - 0.0
Matching ------- 0.0- 0.0
Structure ------- 0.0 - 0.0
Size -------------- 0.0 - 0.0
Color ------------ 0.0 - 0.0
Translucency --- 0.0 - 0.0
Onset ----------- 0.0 - 0.0
Nuclear--------- 0.0 - 0.0
Compare each by scoring a point for similarity or non-similarity. You can score one way or the other, or split a point when present in both. If neither present, score no point
What sizes are the pearls? This makes me think that if I owned that strand I'd have a few favourites in there! Ones that show particular qualities really well?
My thanks, Dave this is so helpful. I have some to test it on so I'll try it on my next free day and let you know how I get on.