Occurrence of mineralization disturbances in nacreous
layers of cultivated pearls produced by Pincatada margaritifera var.
The mass percent of each element in prismatic layer and nacreous
layer are showed in table 1
layer has a laminated, brick-and-mortar structure, says Mehmet Sarikaya, who is conducting the work with Katie E.
Thickness of the nacreous
layer of all pearls was measured using a coherence tomographic scanner (OSLF-1500; Shenzhen Certainn Technology Co.
Peristome oblique; aperture subcircular; columella concave with a broad rounded swelling at its base; swelling non-nacreous
and rather variable in size; interior of aperture nacreous
when fresh, lacking ridges or denticles inside outer lip.
14) Mica flakes were deposited on a thin layer of titanium dioxide to make nacreous
mica pigments described in US4,038,099, (15) US3,650,790, (16) and US3,087,828.
The strange framed chamber, paraphernalia of warlike centuries, faded goldsmiths' work, has swapped old snow for its ancient colours, and its tapestries, of nacreous
lustre, useless folds with the shrouded eyes of sibyls offering their old fingernail to the Mages.
The appearance and size of what remains of the hook from Spit 35 and its nacreous
surface are similar to the hook from Spit 42 and they would appear to be made of the same material and to the same formal design.
With these hardly cheerful 'poesies' Titian sent Philip some of his last religious scenes, no longer sparkling like his early images of the Holy Family, but scenes of Christ's Passion beneath turbulent skies, gloomy but still tremulous with the light of Titian's near-island; transiently multicoloured by a shifting nacreous
empyrean and the ever-changing sea, its vast level horizon tipped with flaring sunrises and sunsets.
The lower two-thirds of the canvas is haunted by densely packed planes of warm, glowing color, their heat tempered by the unifying presence of white canvas shining through the thinned-out paint; as we watch, the casual grid dematerializes, turning into a series of transparent, overlapping stains, before erupting in a splatter of nacreous
10 ridge-like denticles, with an additional row of smaller granules just inside lip edge; apertural dentition absent in immature specimens, in these the outer lip is strongly notched at ends of spiral cords; interior nacreous
, weakly angled beneath external cords, but labral denticles not extending into aperture as in-running ridges.
If the kitchen utensils in previous installations, alluded to food, Atta--like Untitled, 201 I, a painting of nacreous
, doughlike forms--actually depicts it.