Heat-treated succinite modified under air, oxygen or inert gas atmosphere to improve its colour and clarity, was studied with Fourier-Transform Infrared and Raman spectroscopy, and referenced to variously altered untreated samples. For treated amber, the macroscopic observations revealed diagnostic features such as (1) the presence of discoidal “ sun sparkles” inside the crumbs; (2) unusual colours (e.g. dark red) for transparent specimens; (3) mottled colour patches in “beeswax” and “dragon’s blood” amber; (4) luminescence quenching; and (5) significant reduction of pine-tree resinous smell. On FTIR spectra the heat treatment of succinite is mainly marked by: (1) the intensity decrease of 2932 cm⁻¹ band (>CH₂ and –CH₃), followed by the intensity increase of line at 1732 cm⁻¹; (2) the shifts of the band from ν(C = O) towards lower wavenumbers (from 1735 cm⁻¹ to 1714 cm⁻¹); (3) the decrease of intensity of the band at 888 cm⁻¹ ((=CH₂ or –CH = CH–); (4) some slight distortion of “Baltic shoulder” in the region 1100–1300 cm⁻¹. The Principal Component Analysis applied to FTIR spectra enabled to distinguish not only untreated amber from treated one, but also recognize the modifications made under oxygen conditions from the ones in an inert gas. On RS spectra of the treated Baltic amber, the heat modifications are indicated by: (1) slight value increase of the relative intensity ratio I_1650/1445 compared to untreated succinite; (2) the shift of bands near 1650 (C = C) and 1445 cm⁻¹ (CH₂, CH₃) towards higher wavenumbers.

用傅里叶变换红外和拉曼光谱研究了在空气、氧气或惰性气体气氛下改性的热处理琥珀石，以改善其颜色和透明度，并参考了各种改变的未处理样品。对于处理过的琥珀，宏观观察揭示了诊断特征，例如（1）碎屑内部存在盘状“太阳火花”；(2) 透明标本的不寻常颜色（例如深红色）；（3）“蜂蜡”和“龙血”琥珀色斑斑驳；(4)发光猝灭；(5)显着降低松树树脂气味。在FTIR光谱上，琥珀酸的热处理主要表现为：（1）2932 cm ^-1带（>CH ₂和–CH _{3 ）的强度降低}^{)，然后是 1732 cm -1}处的线强度增加；(2) 波段从 ν(C = O) 向较低波数的移动（从 1735 cm ^-1到 1714 cm ^-1）；^{(3) 888 cm -1} ((=CH ₂或-CH = CH-)处谱带强度的降低；(4) 1100-1300 cm ^-1区域的“波罗的海肩”略有变形。应用于 FTIR 光谱的主成分分析不仅能够区分未经处理的琥珀和经过处理的琥珀，而且还能够识别在氧气条件下与惰性气体中的改性。在处理过的波罗的海琥珀的 RS 光谱上，热改性由下式表示: (1) 相对强度比 I 略有增加_1650/1445与未经处理的琥珀石相比；(2) 1650 (C = C) 和1445 cm ^-1 (CH ₂ , CH ₃ ) 附近的波段向更高波数的移动。